Category: Applications

  • Location Industry Hits Speed Bump

    Location privacy issues have the power to put the skids on our industry. When I stepped into the Where 2.0 show, little did I know I was about to see Apple publicly open its kimono, reveal its location collection practices, and further fuel public and government outrage on location privacy.  Apple doesn’t stand alone as Google also stores similar data on Android devices. And in a smaller breach, TomTom’s user location data was sold to the Netherland’s government, helping  to optimize the placement of speed traps. Congress responded by hauling Apple and Google into a Congressional subcommittee meeting. Senator Patrick Leahy captured the hearing’s mood when he said, “American consumers and businesses face threats to privacy like no time before.” He went on to say that he was “deeply concerned” about the reports that iPhones and Android devices were “collecting, storing, and tracking user location data without the user’s consent.”

    Apple’s recent revelation was that its iOS operating system stores user location data in a hidden file. The location was being provided to iTunes during back-ups, giving Apple a log of a user’s movements and activities, for up to a year. A new iOS version reduces the log to a week of data and ends the back up to iTunes. The cache can be eliminated by disabling the device’s location feature.

    Leak from Google Skyhook skirmish. Larry Page, now-CEO of Google, sent an e-mail last year to top executives with the news that Motorola had chosen to use Skyhook, and not Google, location services. According to e-mails leaked to the San Jose Mercury News, Google executives responded by emphasizing the importance of collecting location data from smartphones, and the value of the data.

    “I cannot stress enough how important Google’s Wi-Fi location database is to our Android and mobile product strategy,” Google location service product manager Steve Lee wrote. “We absolutely do care about this (decision by Motorola) because we need Wi-Fi data collection in order to maintain and improve our Wi-Fi location service.”

    At the beginning of 2010, because of public concerns, Google had stopped collecting Wi-Fi data from vehicles used to capture street images for Google Maps’ Street View feature. When the vehicles also scanned an area for Google’s location database, Google admitted that in doing so, it inadvertently collected personal data from unsecured wireless networks. Google had turned to collecting location data via Android phones and the Skyhook move was seen as a major threat.  Motorola later decided to resume using Google’s location services, and Skyhook Wireless sued Google for patent infringement and interfering in its business relationship with Motorola.

    Who’s there? Location veteran Duncan McCall unveiled PlaceIQ at Where 2.0. The company provides meaning to hyper locations, categorizing the types of people, places, social, and digital activity that occurs within a city block or 100 square meters. PlaceIQ doesn’t use personal information but tries to infer information about people situated at a location. For instance, a location might be a trail head at a popular hiking destination or a tourist spot like Fisherman’s Wharf in San Francisco. Place IQ can identify locations in which an advertiser’s target audience has a likelihood to be present.

    Let’s make a deal. Groupon purchased location-enabled social networking company Pelago (Whrrl).  Look for Groupon to take on foursquare, which has led in social networks and local check-in market.  Groupon will move beyond being a new customer acquisition tool to adding a social platform on which a location-enhanced social community will exchange recommendations and insights on deals. A loyalty program will be added to reward check-ins and usage.  Groupon will expand beyond its current local small businesses focus to include national brands and large retailers.

    Keep your hand on your pocket. eBay wants to be your mobile wallet. The company just purchased location-based services provider Where.  Previously called uLocate, Boston-based Where develops mobile advertising, search, recommendation and daily deals services. Where will be housed in eBay’s PayPal division and used to strengthen the company’s position in mobile and hyper local shopping and deals. This fits with eBay’s earlier acquisitions of local shopping start-up Milo, barcode scanning developer RedLaser, and online retailer GSI Commerce.

    Got mail. Last month’s column highlighted indoor location and generated unprecedented mail to my inbox. I mentioned a few companies providing apps that involve indoor mapping or locations, but as many pointed out, there are more. Others include Eakahau, Ehud, Fast Mall, Geodelic, Les Quatre Temps, Point Inside, and Spotlight Mobile. I’d like to clarify that Aisle411 maps offer routing and some interactive capabilities. Choices for indoor positioning include both handset and network solutions like Wi-Fi, GPS, Bluetooth, U-TDOA, Wi-Fi,  radio frequency pattern-matching, and geo-location sensors.

    Mapping for good. Ushahidi, a non-profit organization, developed open software and interactive mapping for “crowd voicing” to increase transparency and allow people to document their condition. After the Kenyan disputed election, 45,000 users contributed information about violence and peace activities throughout the country. The platform was also used after the Haiti earthquake. Ushahidi utilizes an elite team of volunteers for coding and other important jobs. Get involved.

  • LightSquared: It’s Worse than You Think

    Tired of hearing about LightSquared? Think it’s a bunch of panicking journalists hungry for something to write about? Listen, it usually takes a lot to get the hairs standing up on the back of my neck. On the LightSquared issue, they are at full attention.

    Why?

    The GPS receivers that would likely be affected the most aren’t military, automobile, aviation, mobile phones, etc. The GPS receivers that would be affected the most are the ones you use, the high-precision GPS receiver!

    This means any receiver designed to produce accuracies at meter-level or better (submeter, decimeter, centimeter receivers). This means surveying, engineering, construction, bridge/dam/structure/seismic monitoring, GIS, precision agriculture, mining, utilities/telecom, transportation, environmental, disaster management, and all sorts of machine control across a vast number of industries.

    Do the Math

    LightSquared is planning to construct 40,000 ground-based transmitters broadcasting 1,500W each across the U.S. These are targeted at metropolitan areas with high-density population. The will pop-up like mobile phone towers. What do you think a map looks like with 40,000 LightSquared transmitters overlaid on the current infrastructure of CORS (1,500+ GPS receivers in the U.S.) and RTK networks (100+ consisting of several thousands of receivers in the U.S.)?

    Do you use OPUS? Do you use CORS? Do you use an RTK network? Do you use WAAS corrections? Do you use OmniSTAR? Do you use StarFire? Do you operate your own high-precision base station (real-time or post-processing)? I do not know one high-precision user who does not use one of the aforementioned technologies in their GPS operations. All of the above technologies are in jeopardy.

    I’m going to keep this simple. You, the high-precision GPS user, are likely going to be considered collateral damage.

    The military is going to be accommodated in the name of national security. The aviation industry is going to be accommodated in the name of safety-of-life. The auto navigation industry is going to be accommodated because they are high-profile. The high-precision user is going to be thrown under the bus because we are the most difficult to accommodate (technically) and don’t have a high profile nor are perceived as significant enough to accommodate.

    In other words, the high-precision user will be told to “deal with it.”

    What Does “Deal with It” Mean?

    It’s not clear at this point, but without any hardware modification, your receiver performance will likely be degraded (weakened or lost signal) in metropolitan areas, and to a lesser extent in rural areas. That totally depends on where LightSquared decides to place its towers. Very soon, with the final Working Group report due to the FCC (June 15), we will see how serious the interference will be.

    GPS receiver manufacturers would likely offer some sort of hardware upgrade, if possible. You can bet that they won’t support upgrading older hardware and it’s possible some newer hardware won’t be retrofittable, so the upgrade turns into a “trade-in” with a hefty price tag. But beware that a hardware upgrade doesn’t mean it will solve the problem, but rather minimize it.

    In order to have a chance of not being forgotten or dismissed as collateral damage, you need to jump loudly and with resolution to raise awareness with your congressperson and the FCC about the importance of GPS to your operations. If you’re an international user, write the FCC.

    You can view the list of submissions made to the FCC by clicking here. Deere & Co. as well as Fugro and many others provided very clear and concise comments.

    The Coalition to Save Our GPS has posted guidance on its website as to how to submit your comments. They are:


    Voice your concerns directly to Congressional Representatives

    To voice your concerns about GPS interference, you can send letters, emails, faxes, call or visit your Congressional representatives’ office in person to explain how you use GPS as a local business and what the impacts of interference would be to the local economy.

    Contact Your Local Senator

    Ask your Senator to support and co-sign the attached letter from Senators Roberts (R-KS) and Nelson (D-NE): explain how you use GPS in your state and what impact interference or any compromise of the GPS service would have on you and the local economy.

    United States Senate Letter from Pat Roberts (R-KS) and Ben Nelson (D-NE)

    Find Your Local Senator

    Write Your Representative

    Find Your U.S. House of Representatives

    Please include: “Coalition to Save Our GPS and FCC File No. SAT-MOD-20101118-00239” in your correspondence.

    Send your comments directly to the Federal Communications Commission (FCC)

    Email the FCC: [email protected]

    For your ready reference, below are the actions the Coalition is seeking from the FCC:

    1. The FCC must make clear, and the NTIA must ensure, that LightSquared’s license modification is contingent on the outcome of the mandated study unequivocally demonstrating that there is no interference to GPS. The study must be comprehensive, objective, and based on correct assumptions about existing GPS uses rather than theoretical possibilities. Given the substantial pre-existing investment in GPS systems and infrastructure, and the critical nature of GPS applications, the results of studies must conclusively demonstrate that there is no risk of interference. If there is conflicting evidence, doubts must be resolved against the LightSquared terrestrial system. The views of LightSquared, as an interested party, are entitled to no special weight in this process.
    2. The FCC should make clear that LightSquared and its investors are proceeding at their own risk in advance of the FCC’s assessment of the working group’s analysis. While this is the FCC’s established policy, the Commission’s International Bureau failed to make this explicit in its order.
    3. Resolution of interference has to be the obligation of LightSquared, not the extensive GPS user community of millions of citizens. LightSquared must bear the costs of preventing interference emanating from their devices, and if there is no way to prevent interference, it should not be permitted to operate. GPS users or providers should not have to bear any of the consequences of LightSquared’s actions.
    4. This is a matter of critical national interest. There must be a reasonable opportunity for public comment of at least 45 days on the report produced by the working group and further FCC actions on the LightSquared modification order should take place with the approval of a majority of the commissioners, not at the bureau level.

     


    Lastly, following is the list of high-precision GPS receivers that the Working Group (consisting of US GPS Industry Council representatives and LightSquared representatives) have chosen to test:

    Hemisphere R320 (with A52 antenna)
    Hemisphere A320 (with Integral antenna)
    Deere iTC (with Integral antenna)
    Deere SF‐3000 (with Integral antenna)
    Deere SF‐3050 (with Aero antenn
    a)
    Trimble MS990
    Trimble MS992
    Trimble AgGPS 252
    Trimble AgGPS 262
    Trimble AgGPS 442
    Trimble AgGPS EZguide 500
    Trimble CFX 750
    Trimble FMX
    Trimble GeoExplorer 3000 series GeoXH
    Trimble GeoExplorer 3000 series GeoXT
    Trimble GeoExplorer 6000 series GeoXH
    Trimble GeoExplorer 6000 series GeoXT
    Trimble Juno SB
    Trimble NetR9 (with Zephyr 1 antenna)
    Trimble NetR9 (with Zephyr 2 antenna)
    Trimble R8 GNSS (with Integral antenna)
    Trimble 5800 (with Integral antenna)
    Trimble NetR5 (with Zephyr 1 antenna)
    Trimble NetR5 (with Zephyr 2 antenna)
    Leica SR530 (with AT502 antenna)
    Leica GX1200 Classic (with AX1202 antenna)
    Leica GX1230GG (with AX1202GG antenna)
    Leica GR10 (with AR10 antenna)
    Leica Uno (with GS05 antenna)
    Leica GS15 (with Intergral antenna)
    Topcon HiPer Ga
    Topcon HiPer II
    Topcon GR‐3 (with Integral (5/8) antenna)
    Topcon GR‐5 (with Integral (5/8) antenna)
    Topcon MC‐R3 (with MC‐A3/cabled (5/8) antenna)
    Topcon NET‐G3A (with CR‐G3/cabled (5/8) antenna)
    Topcon TruPath/AGI‐3 (with Integral (special mount) antenna)
    NovAtel PROPAK‐G2‐Plus (with GPS‐702/GPS‐701 antenna)
    NovAtel FLEXG2‐STAR (with GPS‐701GGL/GPS‐701 antenna)
    NovAtel FLEXPAK‐G2‐V1 (with GPS‐701GGL/GPS‐702 antenna)
    NovAtel FLEXPAK‐G2‐V2 (with GPS‐702GGL/GPS‐702 antenna)
    NovAtel PROPAK‐V3 (with GPS‐702GGL/GPS‐702 antenna)
    NovAtel DL‐V3
    NovAtel FLEXPAK6 (with GPS‐702GGL/GPS‐702 antenna)
    Septentri PolaRx3e (with PolaNt GG antenna)
    Septentrio AsteRx3 (with PolaNt G antenna)

     

    Thanks, and see you next time.

    Follow me on Twitter at http://twitter.com/GPSGIS_Eric

     

     

     

     

     

  • Space Symposium, Partnership Council Offer Valuable Information

    As it happens April, May, and June are watershed months for space and PNT geeks every year. In April I was honored to attend the National Space Foundation sponsored 27th annual National Space Symposium held at the incomparable five-star Broadmoor Resort in Colorado Springs, Colorado, and in May, just last week I attended the 10th annual GPS Partnership Council at SMC (Space and Missile Systems Center) in Los Angeles, California. Currently I am planning my strategy and greasing the chain on the mountain bike for the sixth annual Space and Cyberwarfare Symposium in the beautiful mountain village of Keystone, Colorado, which is followed later in June by the Joint Navigation Conference, also in Colorado Springs.  I know this is really an incredibly tough June schedule, but somehow I will manage.

    Seriously, my purpose in telling you about these wonderful events is two-fold: number one, they are important events and number two, they are events you should attend if you are the least bit interested in space and especially PNT or GPS. All the events this year had/will have maximum time built in for networking with colleagues and businesses you may not come into contact with any other time during the year. You know that Executive VP for Space you have been trying to see for months? He or she will probably be attending one of these events. Take a shot.

    National Space Symposium

    The 27th National Space Symposium (NSS) just gets better and better every year. Yes, I know I say that every year, but it is true. I have had the honor of attending 24 of the symposiums and have witnessed phenomenal growth. This year there were more than 9,000 participants and yet it never really seemed crowded because the event encompasses the entire Broadmoor resort. There is so much happening that I will have to say this year, for the first time, I did not make it to all the events I planned. But I was able to network, and for a journalist as well as a business executive that is key. I see people at the Space Symposium every year that I never see at any other event probably because there is no other event in the world quite like it. The National Space Symposium is truly unique in its scope and venue and frankly this year I thought, also for the first time, that it could have easily continued for one more day. Then maybe I just might have been able to take in everything, albeit on the run. When you consider that a great many of the attendees start and end their NSS journey with trips to the nearby Rocky Mountain ski slopes, attendees and businesses would not really experience any more downtime due to the symposium adding an extra day, but hitting the slopes is sure is a great and unique way to start and end a business conference.

    NSS Exhibits

    There were more exhibitors this year than ever before, and some of the exhibits, especially the static displays, were phenomenal. For example, as I mentioned in my NSS blog in GPS World, on the first morning I was able to see and actually touch (before I saw the “Please Do Not Touch” sign, of course) the X-37B, the U.S. Air Force autonomous space vehicle. The USAF says the X-37B Orbital Test Vehicle, or OTV, is a non-operational system (an adjective conveying minimal veracity in my opinion) that demonstrates a reliable, reusable, unmanned space test platform. Indeed, on March 5, just five weeks before the 27th NSS, the USAF launched the second X-37B from Cape Canaveral, Florida.x-37b-W

    The OTV-2 launch comes on the heels of the successful flight of OTV-1, which made an autonomous de-orbit and landing at Vandenberg Air Force Base, California, on December 3, 2010, after successfully logging 224 days in space, something for which the current NASA manned space shuttles were never designed  and are unable to accomplish. According to USAF officials, post-flight analysis of OTV-1 revealed OTV-2 needed no significant changes, and the second X-37B flight is aimed at helping Air Force scientists better evaluate and understand the vehicle’s performance characteristics and expand upon the tests from OTV-1.

    The spacecraft measures more than 29 feet long and nine-and-a-half feet tall. Its wingspan is 14 feet, 11 inches, and it weighs approximately 11,000 pounds at launch. The objectives of the OTV program include space experimentation, risk reduction, and a concept of operations development for reusable space-vehicle technologies.
    x-37BThe X-37B OTV is America’s newest and most advanced re-entry spacecraft. Based on NASA’s X-37 design, the unmanned OTV is designed for vertical launch to low Earth orbit (LEO) altitudes where it can perform long-duration space technology experimentation and testing. Upon command from the ground, or as preprogrammed, the OTV autonomously re-enters the atmosphere, descends, and lands horizontally on a designated runway. The X-37B is the first vehicle since NASA’s Shuttle Orbiter with the ability to return experiments and surveillance sensors to Earth for further inspection and analysis.

    The X-37B OTV is a military autonomous space vehicle, and that is where the excitement resides. It brings back memories, from around 1959, of the promised but unfulfilled capabilities of the early Boeing Dyna-Soar or X-20 (yes, I spelled it correctly) space and atmospheric skipping vehicle and, well… just use your imagination. Early estimates are the X-37B OTVs could actually stay on orbit for more than a year if necessary. That sounds like a real time, persistent space surveillance platform/sensor to me, just to name one option among a list of many valuable military missions. I suspect we will be hearing about many more amazing feats and record flights concerning the X-37B or not; and because I attended the NSS I actually got to see the real article up close and personal…that alone was worth the price of admission.

    NSS Presentations

    Certainly the presentations at the NSS are not to be missed, but you have to plan your time carefully since there is so much to see and do. Just roaming the halls of the multiple exhibition areas (four this year) is an education in itself, and you just never know who you are going to run into. Former and current astronauts abound, and senior officers from all services will freely stop and chat with you about the various exhibits and their pet programs. Treat them to beautifully hand scooped ice cream at AGI or a hot Italian Cappuccino at the LMCO booth and who knows what you may learn.

    National Strategic Infrastructure versus LightSquared
    480px-Gen_William_L_SheltonAs I mentioned in my NSS blog, the whole event, both the Cyber and the Space Symposiums, were kicked off by my old friend and colleague General William L. Shelton, the commander of Air Force Space Command. General Shelton tends not to be long winded — in other words, his
    speeches are brief and to the point, and historically right on target. His presentations at the Cyber and Space symposiums were no exception.

    General Shelton took on the new and emerging cyber threats, the future of space with a flat or declining national security space budget, and of course the imminent national GPS threat from LightSquared. As the steward of GPS and as a warfighter himself, General Shelton is the only four-star officer from any service that has manned up, stood tall, and been counted on the LightSquared issue, which is an ominous harbinger (pun intended) of a possibly disastrous future for our warfighters and first responders (see PDF report) — actually, it poses a threat for all GPS users in the U.S. The LightSquared debacle is led by a Luddite administration where no one has the guts to tell the commander-in-chief he has no clothes, or a clue for that matter, when it comes to military or first-responder PNT related technology. Just ask Seal Team Six how important GPS and all the capabilities that GPS enables was to their successful mission taking out Bin Laden. But of course this administration has a history of denying critical PNT-related support to the national strategic infrastructure. Just think back to the eLORAN fiasco, and now there is the LightSquared debacle with the potential catastrophic denial of GPS signals across the United States, or you may wish to refer to it as FCC-sponsored nationwide GPS jamming as I have often heard it described.

    In my opinion, the whole LightSquared issue is ludicrous and borders on the criminal. If LightSquared and inept FCC commissioners, who can’t spell space, have their way, our warfighters and first responders will not be able to train the way they fight in the U.S. or for that matter “… defend the United States against all enemies foreign and domestic…” which, to the best of my recollection, they are sworn to do, and LightSquared would cripple that ability. And this is how the loss of GPS signals across the United States applies to you and me on a daily basis. When you are having a medical emergency, say a major coronary, the short-staffed paramedics will no longer be able to find your home in time to save your life, and the undermanned fire department won’t arrive until your home has burned down or the over-burdened police department won’t arrive until the burglars are long gone, because they will be too busy looking at outdated paper maps trying to determine where you live. And don’t get me started on undermanned FAA control towers, the potential loss of next-gen, GPS enroute navigation, approaches, departures, and sleepy overworked controllers. The entire future of the FAA and our air travel in the U.S. is based on satellite navigation and in the U.S. that means GPS. That is now at risk plus the millions of dollars and jobs that will be lost because of LightSquared. GPS is and always has been a recognized force multiplier and without it critical service providers across our nation will become even more short-handed. and he U.S. could loose over $100B in revenue annually. All so young people, who are mostly too young to vote Mr. President, can have a broadband signal to browse the Internet and play games in the middle of Kansas, or of course the all-important ability to download, read, and comment on those Congressional Bills awaiting the President’s signature…just another promise by candidate Obama that has never materialized. Don’t hold your breath. Write your congressman now.


    LightSquared Webinar Set for May 26, 10 a.m. PDT

    A panel of experts will discuss findings contained in the May 15 status report by the FCC Technical Working Group on LightSquared/GPS Interference Issue. The TWG’s third report is anticipated to include at least some testing results of GPS receivers under LightSquared conditions: terrestrial transmitters in the L-1 Band (1525 MHz–1559 MHz) immediately adjacent to the band (1559–1610 MHz) where GPS and other GNSSs operate. Webinar panelists will represent the high-precision sector, aviation, consumer handsets, and timing infrastructure. Register today.


    NSS Speakers

    Alas, I digress, so let’s step off the soapbox momentarily and move on to more positive happenings at the NSS, but you haven’t heard the last of LightSquared. If only we were so fortunate. Onto the outstanding agenda of presentations… There were almost 100 speakers at this year’s Space Symposium, and if you count the Cyber Space presentations there were well over 100 speakers, some with topics more interesting than others of course, but all the presentations I attended were professional and at a minimum engaging and focused on the future of the space enterprise. Unfortunately you could not go more than five minutes without a speaker expressing his or her opinion, or someone asking your opinion, about the LightSquared debacle. At least I can say that regardless of the opinions, they were certainly passionate.


    Bottom Line At The End: BLATE

    So the bottom line on the NSS is if your interests, personal or business related, are in the National Security Space arena, then the NSS is the place to be. A time-sensitive agenda with interesting and high-level presentations, exhibits from the world’s leading space companies, networking opportunities that are second to none, and all in a venue that King Arthur would love. Truly the Broadmoor accommodations, the courteous and professional staff, the excellent cuisine, and the breathtaking views are second to none. Plan now and see what all the fuss is about at the “Premier Gathering of the Global Space Community,” the 28th National Space Symposium, in the foothills of the Rocky Mountains, April 16-19, 2012.

    GPS Partnership Council

    Fast-forward a mere two weeks and now we are attending the AFCEA (Armed Forces Communications and Electronics Association) sponsored 10th Annual GPS Partnership Council at SMC, Space and Missile Systems Center, at Los Angeles Air Force Base in California. This event, which was successfully and artfully resurrected four years ago by the then GPS Wing Commander, Colonel David Madden, has carried on under the auspices of Colonel Bernie Gruber, the current director of the newly designated GPS Directorate. Managerially sponsored by the local AFCEA chapter with funding provided in the most part by numerous GPS primes and their sub-contractors, this is a first-class event you need to attend if you are a hard-core GPS groupie. The folks at AFCEA ably aided by Colonel J.B. Borris (USAF Reserves), the indomitable event chairman for four years running, and his team — especially this year’s narrator extraordinaire, Captain Tiffany “Tupperware” Ware, who fortunately had a great sense of humor, which certainly comes in handy with this crowd — put on another memorable council. Frankly, even though I fondly remember the old GPS Partnership Councils, pre-Madden, they do not hold a candle to the content and professional first-class events of the last four years. If you are a military, civil, or commercial GPS/PNT professional, or work in a GPS-related industry, then the GPS Partnership Council in Los Angeles is where you needed to be last week, and it is never too early to plan for next year’s event in May 2012. One old-timer I overheard explaining this event to a newcomer said it this way: “Think of this as a joint military, inter-agency, civil, and comm
    ercial get-together of GPS subject matter experts.” That works for me.

    While the venue is two hours west by fast jet and about 6100 feet lower in altitude than the NSS, the same professionalism still prevails. Of course this event is GPS centric and since GPS is so ubiquitous in our everyday lives, we should all take note of the news coming from this important event. While it is only 1/45 the size of the NSS, it is no less important to those who depend on GPS as their raison de vivre. This years’ theme was “Executing Modernization…Enabling New Paths and Beyond.” However, I enjoyed General Robert Rosenberg’s comment, during his rousing remarks relating to the way ahead in a fiscally restrained environment, that the theme might more appropriately be taken from one of Winston Churchill’s famous quotes during WWII, “Gentlemen, we have run out of money. Now we have to think.”

    The speakers at this years’ event, especially General Rosenberg, were on the whole outstanding from the introductory comments by Lt. Gen. Tom Sheridan (USAF), SMC/CC, who will be hanging up his military spurs later this month, encouraged us all to have a good time and left us with a quote from the International Academy of Astronautics, which has declared that to date “GPS is the space program that has proven the greatest human benefit in the history of space.”

    Just after General Rosenberg’s wonderful invigorating and thought provoking lecture, and yes he included the LighSquared debacle, a very senior and well-known member of the audience, who was speaking to me as a colleague and friend and not as a journalist, so I will respect his wish for anonymity, expressed his dismay that… “a private for-profit company should be allowed to wreak such havoc on our critical national infrastructure… it is simply criminal. Why doesn’t someone in the military speak up? What is wrong with this administration? Do you think the President is not aware of the potential devastation he has wrought? This whole LightSquared issue just makes me ill.” I could not have said it better.

    Warfighter Panel

    While it was great to hear about the proclamation by the International Academy of Astronautics, the awesome warfighter panel presentation on the last day of the GPS Partnership Council was in my opinion the highlight of the event. To see and hear how the panel of Army Rangers, Navy SEALs, USAF Special Operators, and USAF aviators and others actually use GPS not only to accomplish their missions but to save lives every day is exciting. The warfighter panel provided feedback on how warfighters’ lives depend on GPS, and as a former warfighter the moving presentations made my chest swell with pride and brought a tear to my eye. These young men and women are going in harm’s way and they deserve the best equipment and support we can provide. At the end of the day the warfighter panel received a much-deserved standing ovation and I was proud to be in the audience. I hope they caught it on video so you can all experience it someday. Emotions were running high to say the least.

    Extras + Networking

    Just as during the NSS, the networking opportunities at the GPS Partnership Council were abundant and rife with potential. Plus fun was had at the biggest networking opportunity of all, the annual golf tournament, where you get to rub shoulders and compare bogies, with a who’s who of the GPS community; plus the now traditional libation-fueled networking event at “Shade” was a fun time for all who attended as well.

    Exhibits

    Certainly the exhibits at this event are at a minimum, but the companies that do exhibit have a very interested, attentive, and GPS-educated audience. If I were running a GPS/PNT/GNSS centric company, I would definitely want to be there as an exhibitor, because 100% of the audience is greatly interested in what you do. While current exhibit space is somewhat limited, there does appear to be room for expansion if needed. The biggest challenge at this event is a common one in California and that is parking, but there was a plan and it worked well as far as I could determine. I did not hear any complaints.

    Boeing II-F Factory Tour

    Since you are attending a GPS event at the home of GPS acquisition, opportunities for additional information abound with the large prime contractors in the area that support GPS, and this year as in the years past we were able to take advantage of that circumstance. This year wearing a slightly different hat I, and several of my think tank colleagues, visited with Ken Torek, the vice president for Navigation and Communications Systems & Space and Intelligence Systems, and his staff, which included Jan Heide, the new Boeing GPS Program Director, at the new Boeing GPS II-F facility in El Segundo, California. We were given the VIP treatment and were able to see IIF satellite vehicles three through seven, all in various stages of completion on the innovative, labor, and cost savings Boeing Pulse Line. In this configuration the satellite comes to you in a fashion that would make Henry Ford proud. While on our tour we learned that SV IIF-2 has already been shipped to Cape Canaveral, Florida, for a launch scheduled sometime in July. We also learned this will most likely be the only II-F launch in 2011. Since there are 31 active satellites on orbit, with three residuals and one in standby mode, the launch schedule has been moved to the right with the lack of urgency resulting in one GPS launch per year for the foreseeable future. Barring a catastrophic event on orbit, this will most likely be the future of GPS launches for the life of the II-F program. As previously predicted we will most probably witness several IIIA launches (built by LMCO) before the II-F launches are complete. My hat is off to Boeing for a great afternoon of briefings and tours, plus here’s hoping for a successful IIF-2 launch in July.

    PRNs and Accuracy

    During the council the USAF and DOT announced that they would be removing the PRN-1 number from SVN-49 (the one with spurious signals that has been placed in standby mode) and releasing the test PRN for use with IIF-2, that when launched in July will utilize PRN-1 while it is being checked out. Once operational, another PRN will be assigned that will be especially helpful for precision users (surveyors and such). Since the ground command and control system cannot currently handle more than 31 PRN’s, for reasons not appropriate to this venue, (a problem that will supposedly be fixed by OCX in 2015) this means that SVN-49 will be placed in residual status for now and in all likelihood also means another SV will be placed in residual status as well, bringing that total number to five SVs in residual status. When I checked this move with other sources they were quick to assure me that this does not mean they have given up on SVN-49 and indeed they hope to find a way to make it a fully functioning member of the GPS constellation in the years to come. No timetable for that move obviously. But I was assured they are still working the issues.

    Since the single on orbit instance of the II-F SV is proving to have an extremely accurate clock, hopes are that IIF-2 will follow by broadcasting a more accurate timing signal, which translates to more accuracy on the ground. Remember from MEO one nanosecond of timing accuracy equates to one foot of position accuracy on the ground.

     

    Another Civil Focus Day?

    Colonel Gruber announced that General Shelton, the current AFSPC/CC will more than likely follow in the footsteps of General Kehler, the former AFSPC Commander, and announce a follow-on Civil Focus Day most likely to be held at Air Force Space Command sometime this year. The first resurrected event of it’s kind in about ten-years, it was a big success in 2010.

    <e
    m>GPS-IIIA: OCX Updates and the Gap

    Colonel Gruber provided us with an update on the GPS-IIIA program by Lockheed Martin, which is on track for the first GPS IIIA launch sometime in 2014, and an update on the Raytheon OCX program, or new GPS ground Command and Control system, due to be operational sometime in 2015. While Colonel Gruber is happy with the way both contracts are progressing, in my opinion we still have the famous “gap” that everyone goes out of their way to explain is not really a gap, but in new government speak as proclaimed by a pundit from the stage during the National Space Symposium, what we really have is “negative operational margin.” But seriously it is still a gap, no matter how you characterize or spin it and one that still needs to be closed. And yes I know all about the plan to fill the “gap that doesn’t exist” with the new LCS (Launch and Checkout System). While I don’t object to LCS per se, I do object to the way ahead as currently envisioned by SMC. There is in my opinion an extremely clear way ahead for LCS; why not use the same incredibly reliable, low risk, and very affordable independent LADO (Launch/Early Orbit, Anomaly Resolution, Disposal, and Operations (LADO) System, built by Braxton Technologies, that the USAF used for the IIA, IIR, IIRM, and IIF SVs and is the only technology that allows us to operate residual satellites today? Can you say past performance matters? Can you understand excellence and low risk are key performance parameters? Alas, on this issue the acquisition community for some reason beyond my ken cannot, and now the politicians and cost accountants are involved. Indeed, it has become the dreaded forest for the trees sort of issue. I’ll do my best to keep you updated. And I would very much like to say that surely reason, logic, and common sense will prevail, but then I inevitably think about the LightSquared debacle and I am not at all sanguine about filling the gap, excuse me, the negative operational margin, in a logical or timely fashion with the current plan in place. For the same reason I am not sanguine about the U.S maintaining GPS as the Gold Standard for the world. Can you spell insanity? L I G H T S Q U A R E D or just abbreviate it as F C C, take your pick.

    Constellation Update

    Colonel Gruber’s constellation update read like this (comments are mine):

    Status of the Enhanced 24 GPS Constellation

    • 35 total GPS satellites on orbit (Most ever on orbit)
    • 31 total GPS satellites set healthy (Max for AEP)
    • 3 residual GPS satellites (enabled by LADO)
    • 1 standby GPS satellite (SVN 49)
    • IIA – 11 GPS satellites on orbit (average life 16 years, oldest 20 years)
    • IIR – 12 GPS satellites
    • IIR (M) – 7 GPS satellites
    • IIF – 1 GPS satellite

    It was a very uplifting and “good news” presentation right up to the point where someone in authority hinted that the entire GPS Modernization effort being briefed by Colonel Gruber was in danger due to the LightSquared debacle. Do you sense an underlying theme?

    GPS Hall of Fame

    At the end of Colonel Gruber’s presentation we all had a nice surprise when he inducted the distinguished aerospace engineer  William (Bill) Feess from Aerospace Corporation into the GPS Hall of Fame. Bill has been a stable and guiding force at Aerospace for the last 48 years with many of those years spent in the GPS arena dating from the 621B era. A well-deserved honor for Bill and the Partnership Council was the perfect venue for the award.

    Rockwell Collins

    During one of the numerous networking breaks I ran into Trevor Overton the Principal Program Manager for Surface Navigation Programs and Government Systems at Rockwell Collins, the company that produces the DAGR or Defense Advanced GPS Receiver. Rockwell Collins had a large booth and display, as they do every year and they were well represented in the DAGR and micro-DAGR arena by Gina Krug who serves as the Principal Account Manager for Precision Navigation and Government Systems. Mr. Overton is the one that got my attention however because somehow his title translates into the engineer who is in charge of the embedded side of the GPS operations at Rockwell Collins and he let me know rather quickly and in no uncertain terms that he had nothing to do with the handheld DAGR but worked solely with embedded systems. Then he showed me the fruits of Rockwell’s latest endeavor, the MicroGRAM, a new embedded GPS with GPS SAASM (v3.7) chip that area wise is about the same size as an SD chip, 19 mm sq, but about three times as thick since it is built with 90 nanometer technology. It has solder points for embedding on a systems board by OEMs (original equipment manufacturers) and is 12-channel capable. However, it was the near SD size that intrigued me. While embedded works and I hope they sell a ton of them, being able to slide this GPS + SAASM chip capability into an SD slot on any device with an SD slot, an antenna and a display is very appealing and constitutes a capability the war fighters have been asking for and could benefit from today; but Rockwell tells me there would be significant security issues with this approach. More on this chip in a later article when I have had a chance to visit Rockwell Collins and see what the future holds. Iowa in the Spring sounds doable.

    GPS and Seismology

    There was a very interesting briefing on what is now known as the Tohoku earthquake and tsunami in Japan. Seismologist have apparently settled on a 9.0 rating on the Richter scale, which is the fourth largest earthquake on record since 1900, with enough power was generated to power the entire planet for 40 years if someone could figure out a way to harness all that raw power. The Tohoku earthquake and tsunami are catastrophic events that Japan and the world will long remember. Undoubtedly there will be lessons learned, especially in the nuclear power plant protection arena. In the briefing at the GPS Partnership Council, we learned that Japan had prepared as best they could from a geodetic warning point of view by building more than 1,000-networked GPS receiver sites known as GEONET. It was hoped that GEONET would provide warnings of cataclysmic seismic events, but the system experienced a real-time telemetry failure, as in it is hard to transmit when your antennas are under a hundred feet of seawater. However, now critical GPS data from the event are being retrieved and processed so there are still valuable lessons to be learned even in a post-processing environment. One of the most impressive graphs of the data shows that just prior to the tsunami the GPS monitoring stations around the Sendai area of Japan actually shifted to the east by four meters. I was shocked by that information. You might expect four centimeters or four inches of movement but four meters represents an event of catastrophic proportions in the seismology world, and indeed we have all seen the results on the nightly news. Obviously the GPS seismology data is crucial to future earthquake planning and even to earthquake-proof building codes around the globe. Consequently, in the future in Japan and in the Unites States we can expect to see GPS used co-seismically as a real-time monitoring and warning tool. The question is how do you make the seismology warning system survivable to a four-meter (~12 feet) physical displacement and able to survive a 125-foot wall of seawater moving at jet speeds?

    Garmin Has a Deal for You

    During another of the networking breaks I was introduced to Rick Evans, a former Marine, who serves as the business development manager for government and law enforcement at Garmin, in Olathe, Kansas. Since Garmin does not have a designated military division, this is as close as it gets. It is a
    well documented fact (we have a database of more than 8,000 responses to surveys and interviews) that a huge majority (>95%) of our warfighters use Garmin or other civilian, commercial equipment in theater because it works, meets their needs in a non-jamming environment, and has a very user-friendly interface. I plan to follow up with Rick and possibly visit Garmin, but I want to pass on a bit of interesting and valuable information to our warfighters and first responders. If you fit in either of those categories, there is a website just for you that allows you to order Garmin equipment at a considerable discount. But again it is only for warfighters and first responders/law enforcement, and you can find it at Strohman Enterprises. More on this at a later date. Let me know how this works for you if and when you order from this site.

    Future Events

    I’m running out of airspeed and space but I do want to mention two upcoming Colorado events I will be attending in June and you should attend if you are interested in GPS and the warfighter or from a first-responder perspective. The first event is the Space and Cyberwarfare Symposium in Keystone, Colorado, June 14-16. This will be the sixth year for this up-close-and-personal gathering of space and cyber experts. This year’s theme is Space and Cyberspace Innovation: Leveraging the Enterprise to Win the Joint Fight. And of course today it is all about the joint fight. Even the Seal Team Six raid in Pakistan was a joint endeavor. I’m sure we will hear more about that at the Symposium.

    My favorite parts of this symposium are the small size and the access you have to senior decision makers who are far away from their office and phones and able to relax in the Rocky Mountains. There are extended networking sessions between briefings that provide you with plenty of opportunities to connect. Plus, do you know how much farther a golf ball flies at 10,000 feet? It really makes a difference. So you can probably predict my next favorite features are the venue and the people involved. This professional and educational yet relaxed atmosphere event is very well put together and you will be happy you attended. Come join me as I ride my mountain bike alongside the roaring Snake River — with GPS attached of course. Hope to see you there.

    ION

    The next event is the annual ION (Institute of Navigation) and JSDE or Joint Services Data Exchange co-sponsored Joint Navigation Conference (JNC), which will be held in Colorado Springs, Colorado, this year and next. This year’s FOUO events take place June 27-30 at the Crown Plaza Hotel, while the classified session on June 30 takes place at the Elkhorn Conference Center located on Ft. Carson in south Colorado Springs. According to ION officials, this year’s JNC will be the largest U.S. military navigation conference of the year, with joint service and government participation. The event will focus on technical advances in positioning, navigation, and timing (PNT) with emphasis on joint development, test, and support of affordable PNT systems, logistics, and integration. From an operational perspective, the conference will also focus on advances in battlefield applications of GPS, critical strengths or weaknesses of fielded navigation devices, warfighter PNT requirements and solutions, to include navigation warfare. Plus the classified warfighter panel on June 30 at Ft. Carson (USA) should be enlightening because the warfighters are free to speak in a classified environment (SECRET) and relate details and experiences that would not be possible in a public forum. So go online and register today and don’t forget to have your security manager send your clearances and join us for the warfighter panel.

    So June looks like it is a busy month for PNT professionals. I hope to see you all in the Rocky Mountains. Until next time, happy navigating.

     

  • Location Privacy: Will It Derail Mass Market LBS?

    This column rarely covers privacy as a critical issue to build location-based services markets. Why? It was our contention that most LBS are opt-in — or opt out — at the discretion of the consumer, making privacy an important issue, but not a market stopper. Frankly, many privacy panels at location conferences either bordered on hysteria, or were not relevant to market growth. However, since the recent Where 2.0 conference, which revealed that some entities were storing location information without users’ permission, the privacy issue has the potential of suppressing products and markets before they even start. Some are dubbing this new privacy concern Locationgate.

     

    SATNA CLARA, CALIFORNIA — In a potential breach of public trust — and perhaps thwarting LBS market growth — it was revealed at the Where 2.0 conference here (April 19-21) that location data was secretly stored in all iOS 4 devices. Since the conference, where attendees learned that Apple was storing a file with location data in every iPhone or iPad with iOS 4, Sen. Al Franken (D-Minn.) asked Apple CEO Steve Jobs to address privacy concerns about the operating system, particularly for children, who make up 15 percent of users.

    In a letter to Jobs, Franken asked why Apple consumers were not informed of the collection and retention of their location data, how frequently is a user’s location recorded, why is this information not encrypted, with whom has the information been shared, and what is the purpose of collecting the location data.

    Apple contends that iOS devices are not logging the location of the user, but caching a database of Wi-Fi hotspots and cell tower locations around a user’s position. Some of these cell towers may be many miles away from the user.

    At our deadline, Franken, chairman of the Judiciary Subcommittee on Privacy, Technology and the Law, will this week be heading the subcommittee’s first hearing, titled “Protecting Mobile Privacy: Your Smartphones, Tablets, Cell Phones, and Your Privacy.”

    According to published reports, scheduled to testify at Franken’s hearing are Alan Davidson, Google’s U.S. director of public policy, and Bud Tribble, Apple’s vice president for software technology. Other hearing attendees include privacy experts and representatives from the Federal Trade Commission and the Department of Justice.

    Privacy is becoming an issue for consumers who are using Facebook Places, Foursquare, Gowalla, Twitter, and other social media more frequently. In fact, one company, Neer, which is a subsidiary of Qualcomm Services Labs, has an entire business plan based on privacy. Neer’s social media system allows users to determine where, when, and to whom their location information is sent.

    Location privacy is starting to be a big issue overseas. According to published reports, South Korea sent police into Google’s Seoul office this month to examine how the company’s AdMob platform and Android devices can collect private data about user’s location. Google purchased AdMob last year for $700 million.

    In France, companies with with GPS-enabled devices are required to turn the systems off during an employee’s personal break, said lawyer Francoise Gilbert, in a privacy session at Where 2.0. “There is a significant difference in laws [overseas]. One size doesn’t fit all,” she said. “It is a bad idea to talk to your lawyer the day before you plan a product or website launch.”

    In addition, at Where 2.0, the American Civil Liberties Union had a speaker and booth on site to educate developers on privacy issues. The ACLU was promoting its 2011 Privacy Challenge for developers of smartphones and other applications.

    Where 2.0 LBS Developer’s Dream?

    This year’s Where 2.0 was the largest ever. The crowd was overflowing with developers — and the companies that were happy to license products to them. Where 2.0 started out as an offshoot of the geographic information systems industry — and still has that GIS feel.

    Navteq, which said it now has 50,000 developers in its network, showed off its Destination Maps product which features pedestrian-friendly guidance, including showing how they “cut across” open areas. The company rolled out advanced mapping collection technology, including rotating LIDAR, that captures 3D data points.

    A number of significant announcements came during Where 2.0, but were not made at the conference. Boston-based Where was purchased by eBay for $135 million in as big a deal as any this year in the LBS industry. According to published reports, Where was considering an acquisition bid from Research in Motion.

    Where, formerly called uLocate, was founded in 2003 to provide location tracking for GPS-based cell phones. The company changed its name and refocused on LBS markets to include a location-based advertising network, location search, and recommendation applications. The company rapidly grew — from 30 employees to more than 120.

    In another deal made within a day or so of eBay’s, Groupon bought Seattle-based Pelago for an undisclosed amount. Pegalo CEO Jeff Holden, a former Amazon executive, will head Groupon’s product development. Pelago operated a check-in service called Whrrl.

    In other industry news:

    • ALK Technologies recently announced that industry veteran Barry Glick is joining the company as chief executive officer. Glick, who led GeoSystems and launched MapQuest, has been involved in high-profile company sales. GeoSystems, and MapQuest, was acquired by AOL/Time Warner. Glick later was at the helm of France-based Webraska Mobile Technologies, which was sold to Sanef. Glick moved on to Navteq, where he was vice president of mobile and media products. Glick’s hire and track record make those in the industry wonder if he plans to spearhead the future sale of ALK.
    • I have written about location technology markets for nearly 19 years. Call me a grumpy old man, but every time I pull out my reporter’s notebook to write something down that a young Google, eBay, or Facebook executive has to say at a location conference, they say zero about the market, or frankly, anything relevant. Sad thing is that people show up to see these big-name companies — only to be disappointed. Seems as if these younger execs say a lot, but say nothing. One seasoned industry executive in the crowd lamented, “This person runs (insert company)’s location efforts — and said zero about the location market and how they fit into it.”

     

  • Alabama Tornadoes: This Editor’s Personal Experience

    Wall cloud approaching.
    Wall cloud approaching.

    Four years ago my wife and I moved to Lake Guntersville as our ultimate retirement location because it seemed to have ideal factors we were looking for — mountains, lakes, great fishing, mild weather, low taxes, low cost of living and genuinely nice people. This inland location had navigable water to the Gulf of Mexico and even to the Great Lakes. We liked the small town atmosphere away from coastal hurricanes, panicky road clogging evacuations, blizzard, earthquakes or big tornadoes. Well, so much for that plan as we had a front row seat to one of the biggest tornado events of the decade with one of the tornadoes passing 500 yards in front of our windows.

    Just like in the movies, on Wednesday morning, April 27, the winds started to pick up, tornado alarms sounded, and debris started flying, including outdoor furniture. The boathouse next to us had the shingles stripped off the roof like a deck of cards, and then big oak trees started toppling over. The lake looked like it was boiling violently as winds in Guntersville reached 130 mph. We could see countless power lines and transformers arcing green and then going dead. Many buildings and trees were okay while others were totally demolished.

    Downed trees caused much of the damage.
    Downed trees caused much of the damage.

    My visual estimate was that at least 10 percent of the power poles and lines were damaged or toppled. It’s now six days after the storm. Although utility crews have been busy putting in new poles and lines, much remains to be done and I’m doing this article on battery power from my car charger.

    This tornado event was unusual in that Alabama rarely gets more than one tornado at a time with most being the smaller F-1/F-2 storms. Tuscaloosa got the worst of it with an F-4 that stayed on the ground for 70 miles.

    Concrete block walls were no match for the 130 MPH winds.
    Concrete block walls were no match for the 130 MPH winds.
    This was a TV repair shop in downtown Guntersville.
    This was a TV repair shop in downtown Guntersville.

    Our county, Marshall County, was lucky with only 10 tornadoes during the 8 hour period. I don’t think any were over an F-2 but Marshall County still had 5 fatalities. Alabama had over 200 tornadoes that day with fatalities nearing 300.

    One thing that really impressed me about the people in Alabama is their resilience and willingness to help their neighbors. There was no hand wringing waiting for the government to help. Almost immediately after the first tornado you could hear the sound of chainsaws as neighbor helped neighbor dig out and clear the roads. This helped the city and county get most roads passable within a day.

    People helping people.
    People helping people.

    Local businesses helped also. Within 12 hours T.L.’s Barbeque and our favorite seafood restaurant, Crawmama’s, had a catering service set up in downtown Guntersville providing free meals for the National Guard, emergency workers and anyone who needed a hot meal. Crawmama’s is one of those hidden gems that serve seafood comparable to the best restaurants in New Orleans.

    After the tornadoes, NOAA captured ortho imagery of the affected areas using a King Air at 5000 ft. The imagery can be seen at the NOAA website. Pictometry is providing low altitude high resolution ortho and oblique imagery and there are stunning video clips of the Tuscaloosa tornado on youTube.

    The first tornado came and went so fast that I really didn’t have much time to ponder the event. However the unexpected surprise was news media reports that we could expect numerous tornadoes during the 8 hours following the initial tornado. The tornado alarms sounded again and again throughout the day and I can tell you from first-hand experience that getting through this was much easier thanks to the location based GIS services of my iPhone. Here is why.

    When the power was still on we had the luxury of watching the television news with Doppler radar and all the detailed graphics. Once the power went out all we had were tornado alarms, a portable radio and my lowly cell phone.  The tornado alarms were nerve racking since they went off so often. I later learned that the alarms are linked county-wide so a tornado threat anywhere in the county will cause all the alarms to sound. Radio stations were helpful but it was difficult to form a clear picture of the moving storms.

    IMG_1482The iPhone proved to be wonderful. It continued working even after power was lost so we could communicate with family members. From the first power outage until now the cell phone service continued un-interrupted. The service did slow and show weaker cell tower signals as the system switched to battery power and standby generators.  But it did continue to work.

    Most important, the iPhone radar mapping application from the Weather Channel provided us with a video loop of weather bands and their path on a Google map so we could see for ourselves how the storms were moving and if we would be affected. This really put our minds at ease most of the time despite numerous tornado alarms.  Throughout the day as we dodged other tornadoes, I thought about all the man-hours I and my colleagues spent in the early ’90s digitizing street centerline data and addresses ranges to build the digital street databases and other maps that are now the backbone of location based services.

    I never could get really excited about the tiny screens of smart phones but this tornado event and even more mundane applications such as navigation are making me appreciate these little devices. My iPhone has replaced my cell phone, camera, calculator, notepad, and now my GPS. I liked the navigation and Google maps of my iPhone but many times, such as in DC traffic, it was hazardous looking at the screen. So I was very pleasantly surprised with an application that turns the iPhone into a full featured car navigation system including voice navigation and real time traffic. The MotionX GPS Drive  is one of the hottest selling applications for the iPhone and I’m a convert. I bought a mounting bracket that lets me mount the iPhone on the AC vent of any rental car and I now don’t bother packing my old GPS. The only downside is that it uses up the iPhone battery so I have a 12v adapter to keep it charged when using navigation.

     

    That little iPhone and GIS keep making my life better. So for all the hand wringers nearly panicked that their iPhone tracks their location and worried about their privacy, my vote is for more and better location-based services.

    Photos: Art Kalinski

  • Q&A from L5 and LightSquared Webinars

    In late March, I conducted a webinar titled “A Closer Look at L5: The Future of High-Precision GNSS,” in which I discussed the impact that the new GPS L5 signal/frequency may have on high-precision users. Then, in April I was part of a discussion panel-format webinar titled “LightSquared: Our Story So Far.” Many questions and comments arose from both webinars, and I’ll attempt to address those in this column.

    First of all, the day after the March 17 webinar, I published a summary with some links and illustrations. If you want to review it to refresh your memory or get a quick overview if you didn’t attend the webinar, click here.

    During the March 17 webinar, I conducted several polls. Following are the poll questions with accompanying pie charts to illustrate the results. I think polls are a great tool to gain a better understanding of what your colleagues are thinking.

    Poll #1: Does your organization use dual frequency GPS (L1/L2) receivers?

    Gakstatter comment: Nothing earth-shattering, but good to know most of the audience members polled are high-precision users.

    Poll #2: When do you plan on upgrading your GPS receivers to take advantage of the new L2C and L5 signals?

    Gakstatter comment: I think the large number of “I don’t know” answers is due to two major variables. #1 is the economy. If the economy was healthy, I think folks would be more inclined to take the risk upgrade to the latest technology. #2 is the unclear status of GPS and Galileo (and other GNSS). If there was a launch schedule that people knew they could count on and plan for, I think users would be more inclined to upgrade sooner rather than later.
    Poll #3: Do you believe that GPS and Galileo will meet their projected deployment dates of 2014/2015?
    Gakstatter comment: I understand the skepticism about GPS and Galileo staying on schedule. I don’t think the GPS schedule can push out too far because the FAA requires a full constellation of GPS satellites broadcasting L5 by 2019. The Galileo program is under a lot of pressure to deliver something to the user community. A very important milestone this year is the scheduled September launch of the first two operational Galileo satellites, followed by the launch of a second pair the first quarter of next year. This is an opportunity for the Galileo program to set a new tone and sense of urgency with the user community.
    Poll #4: How concerned are you that LightSquared’s initiative might interfere with your GPS operations?
    Gakstatter comment: Since the March 17 webinar, there’s been much more information released and published about LightSquared’s potential effect on GPS. In April, I participated in a webinar about LightSquared’s potential effect on GPS with my portion of the webinar specifically addressing high-precision users. I will discuss this later in this article. But, suffice to say that this is a serious issue for the U.S. high-precision GPS user community. LightSquared isn’t going to walk away from this without putting up a big fight, and they have enough of an argument that I could see the FCC (Federal Communications Commission) folding or trying to negotiate a compromise. However, any compromise is likely to have a negative effect on the high-precision GPS user community. Best case scenario, there would be a hit in signal strength. Worst case, you’ll need a hardware upgrade.
    As I normally do, a number of questions were raised during the webinar and I will address them here to the best of my ability. I’ll start with the L5 questions and then address some of the questions regarding LightSquared that were asked from both the March and April webinar.

    On to the Questions

    Question #1: What impact will L5 have on RTK networks?

    Gakstatter comment: Great question. There’s only upside in having another GPS frequency to work with. Since the premise behind RTK Networks relies heavily on atmospheric modeling, L5 is going to help. It’s further separated, with respect to frequency, from L1 than L2 and the signal is much stronger than L2. L5 will go a long way in mitigating the effects of the atmosphere on high-precision GPS positioning.

    They logistics of implementing L5, by the manufacturers, into RTK Networks may not be so easy. I’m not sure that L5 has been defined well enough in the RTCM specifications and even if it was, I’m not sure how fast manufacturers would implement it. Take, for example, L2C. Even though there are eight satellites broadcasting L2C, I’m not sure there are any RTK Networks taking advantage of it and transparency between different rover manufacturers. However, my gut tells me that manufacturers will be more willing to jump on the L5 bandwagon with a sense of urgency due to the potential significant increase in receiver performance.

    Question #2: What could be a better frequency combination in terms of acheiving higher sensitivities: L2C/L5 or L1/L5?

    Gakstatter comment: This is another great question. Technically speaking, I’m guessing that L2C/L5 would be a higher-performing combination due to the significantly-improved code structure of L2C (longer code and improved error-correcting methods), which allows
    the signal to be acquired and tracked better in tough GPS conditions such as under tree foliage.

    Question #3: If I toggle on L2C in my current Trimble GNSS; that would give me an extra 8 SV broadcasting

    Gakstatter comment: Good, creative thinking, but it doesn’t work that way. You are already using those eight satellites with L1 C/A and L2P. If you utilize L2C from those satellites, you’ll get some marginal gain in performance (assuming the reference station is broadcasting L2C info), but nothing like adding eight additional satellites.
    Question #4: What accuracy can be expected from single frequency L5?

    Gakstatter comment: It’s going to be better than L1 C/A due to the stronger signal strength (4 x more powerful than L2C) and much longer code structure (than even L2C). With SBAS corrections, we’re seeing about 60cm now with L1 C/A. It will probably be slightly better than that and definitely more robust positioning in marginal GPS conditions.

    Question #5: What sort of base line distances can we expect to get with L5?

    Gakstatter comment: Using L5 will definitely help with longer baselines, but baselines are already pretty long. Look at the distance between reference stations in RTK Networks today. Some are pushing 70-80km. Will they go longer than 100km? I’m not sure. That would be cool, lowering infrastructure costs of setting up and operating RTK Networks.

    Question #6: Using RTK corrections the bandwidth requirements will increase with all these extra satellites will there be more efficient correction broadcast techniques like CMRx?

    Gakstatter comment: I agree. I think there will need to be an efficient way of getting the data from reference network to rover. That either means using up more bandwidth on your mobile phone data plan (if you aren’t using UHF/VHF/Spread spectrum radios) or manufacturer’s inventing more efficient formats. 

    Questions Regarding LightSquared

     

    LS Question #1: LightSquared is going to filter their signal heavily until it will not interfere. They have too much invested to fail.

    Gakstatter comment: I agree that LightSquared is not going to walk away from their huge investment. But even if they heavily filter the base transmitters (40,000 of them), I still think there will be some interference. The nature of high-precision GNSS receivers is that they have a wideband RF front-end to take into account better code tracking and accomodate other signals such as OmniSTAR and Starfire. 
    Also, since LightSquared can’t control the design/production of the mobile phones that will use their system, each of the mobile phones can potentially be a “mobile GPS jammer”. It’s one thing to know the fixed location of each of the 40,000 transmitters, but how about the tens of thousand, hundreds of thousands or millions of mobile phones using the LightSquared infrastructure.

    LS Question #2: What do you see as the future for OmniSTAR?

    Gakstatter comment: Obviously, OmniSTAR and Starfire people must have major concerns since they are well within the LightSquared frequency spectrum. Ironically, OmniSTAR currently leases satellite bandwidth from LightSquared to broadcast their corrections.

    I’m sure they are working on a solution, but I’m not privy to what the options they are considering.

    Another option is another delivery method such as NTRIP over mobile phone networks.

    LS Question #3: If the signal effects high precision users, it will also effect casual users(hunters, fishermen, and also field technicians – forestry inventory and utility asset mapping – will w ALL need to change the GPS devises currently used today?

    Gakstatter comment: It won’t affect casual users as much as high-precision users due to the inherent design of the receivers. But, you’re right about forest inventory, utility mapping, etc. which typically use high-precision receivers. If LightSquared is allowed to continue on their desired path, it’s possible that each high-precision receiver would need to be upgraded (or traded in). That’s the worst-case scenario.

    LS Question #4: Would better filters on the GPS receiver front-ends improve the concerns?

    Gakstatter comment: Yes, but it’s not clear if high-precision receivers would perform as well with such filters designed into the receiver.

     

    LS Question #5: Is the transmitter the cell phone or Lightsquare base station?

    Gakstatter comment: This is a bit outside of my area, but both are transmitters. The LightSquared base stations are designed to broadcast at 1,500 watts while the mobile phone’s highest transmission power is probably 1-3 watts while it’s first connecting to the network. The base stations are transmitting at the band adjacent to GPS on the lower end while the mobile phones transmit in the adjacent band above the GPS. I look forward to reviewing the data in the next working group report to the FCC which includes interference testing from both base station transmitters as well as mobile phones.

    LS Quest
    ion #6: 
    How does LightSquared affect L2C, if at all?

    Gakstatter comment: From what I know and have read, I don’t think it would have any direct affect on L2 since L2 is at 1227MHz, far from LightSquared’s frequency spectrum of 1525MHz to 1559MHz. Indirectly, it would have an affect on L2P as L1/L2 receivers need L1 to utilize L2P. That’s not the case with L2C, but remember there are only eight satellites broadcasting L2C at this time.

    Obviously, there is more to discuss. I didn’t touch on the affect on GLONASS receivers (yes, there is a potential problem too). The feedback I received from the LightSquared webinar is that many of you would like to have a webinar that is focused on LightSquared as it relates to the high-precision user (surveying, mapping, engineering, GIS, etc.). I plan to conduct such a webinar in early June. Stayed tuned for the announcement. Hopefully, I’ll have some interesting new data to present from the report due to the FCC on May 15.

    Lastly, I attended NOAA’s Space Weather Workshop last week in Boulder, Colorado. I plan on a more comprehensive write-up, but in the mean-time you can check out my Geospatial Solutions Weekly newsletter with some info on my visit there. I’m still working on a GPS space weather notification system I wrote about last summer. I’m getting closer to having something for you.

    Thanks, and see you next time.

    Follow me on Twitter at http://twitter.com/GPSGIS_Eric

  • Position: 20 Kilometers, Heavy Construction

    World’s Longest Immersed Tunnel, 40 Meters Underwater

    By Anna Jensen, Dirk Hermsmeyer, Bastian Huck, Jürgen Rüffer, and Peter Skjellerup

    The Fehmarnbelt Positioning System between Denmark and Germany includes a geodetic basis, four permanent GNSS stations, and a real-time kinematic (RTK) service for construction of a road and rail causeway between the islands of Fehmarn, Germany, and Lolland, Denmark, across the Fehmarnbelt, a 20-kilometer stretch of open water in the Baltic Sea. This homogeneous, consistent, coherent, highly accurate GNSS-based positioning system exemplifies comparable systems and services that can be established for any major construction site or infrastructure project. Now in use for environmental, geotechnical, and geophysical investigations, it provides cost-efficient operations and facilitates the precise navigation of large, costly offshore equipment.

     

    A fixed road-and-rail link across the Fehmarnbelt body of water in the Baltic Sea will by 2020 connect the German island of Fehmarn and the Danish island of Lolland. It will provide a critical time- and cost-efficient trade and traffic link between north-central Europe and Scandinavia.

    Geophysical and geotechnical pre-investigations have been completed as well as an environmental assessment of the fixed link. Initially proposed as either a bridge or a tunnel (Figure 1), an immersed tunnel is now the preferred solution. It will be placed in a trench excavated on the sea floor, and covered with a layer of stones. It will be the longest immersed tunnel in the world at 17.6 kilometers, excluding peninsulas on both sides to be constructed for easier entrance to the tunnel. The strait is 20 kilometers wide at the site. The immersed depth is up to 40 meters.

    During planning and construction of the fixed link, it is very important to be able to perform reliable positioning with high accuracy. This requires a well defined geodetic basis — a 3D reference system and a reference frame for GNSS positioning, a height system and a geoid model for working with heights, and a map projection for plane maps and drawings. The ability to determine positions with high accuracy in real time within the project area is also very important. Therefore a carrier phase-based GNSS positioning service, a real-time kinematic (RTK) service, has been established.

    Altogether, we refer to the geodetic basis and the RTK service as the Fehmarnbelt Positioning System (FBPS), and the geodetic basis as the Fehmarnbelt Coordinate System (FCS). In this article we describe the geodetic basis and the RTK service, including four new permanent GNSS stations established for the purpose.

    Geodetic Reference Frame

    The reference system for the FCS is the International Terrestrial Reference System, realized by the ITRF2005, the newest and to date most accurate realization of the ITRS.

    Four permanent GNSS stations were established around Fehmarnbelt during the autumn and winter of 2009/2010: two on Fehmarn and two on Lolland (Figure 2).

    After establishment of the GNSS stations, seven days of GNSS data were collected in February 2010. Coordinates for the stations were determined by the National Survey and Cadastre-Denmark, using the Bernese GPS software. Data from six GNSS stations of the network of the International GNSS Service (IGS) was included in the data processing, and these stations with coordinates in the ITRF2005 were used as reference stations. Hereby, the ITRF2005 was introduced in the Fehmarnbelt area, and a reference frame for positioning in three dimensions has been established.

    Height System and Map Projection

    The height difference between Germany and Denmark is known from a 1987 hydrostatic levelling between Puttgarden and Rødbyhavn. For the Fehmarnbelt Fixed Link, precise levelling has been carried out between the connecting points of the hydrostatic levelling and stable point groups further inland. Levelling points with a large displacement since 1987 were eliminated, and the hydrostatic levelling was then used for transfer of the height difference between Germany and Denmark.

    The next step was determination of present mean sea level (MSL) in the Fehmarnbelt and establishment of a project-specific height system with the zero-level as close as possible to the actual MSL of Fehmarnbelt. In this area of the Baltic Sea, a slow rise of MSL relative to the neighboring land is taking place, and therefore water-level data from Heiligenhafen on the German mainland, and from Puttgarden and Rødbyhavn, was analyzed in cooperation with the Danish National Survey and Cadastre and the Danish National Space Institute.

    Analyses of the last 20 years of water-level data show an increase in the water level of approximately 2 millimeters per year at Rødbyhavn. Data from Heiligenhafen was also analyzed; as Heiligenhafen is not directly adjacent to the site, the time series was not used directly for establishing the MSL datum but instead used as an independent control.

    Water-level data was used for estimation of the present MSL in Fehmarnbelt, and the zero level for the FCS Vertical Reference 2010 (FCSVR10) coincides with MSL at Rødbyhavn in 2010. The zero level of FCSVR10 thus deviates from both the German and the Danish height systems.

    The Danish National Survey and Cadastre conducted precise levelling to determine FCSVR10 heights to the four new permanent GNSS stations, and determined FCSVR10 heights to a number of existing height benchmarks on Fehmarn and Lolland. Local land uplift on Fehmarn and Lolland causes differences between the FCSVR10, the national German DHHN92 height system, and the national Danish Vertical Reference 1990 height system. Differences between the height systems are not constant values but vary within the area, so it is very important to use the geoid models when converting heights for high-accuracy applications.

    To determine heights relative to MSL with GNSS it is necessary to utilize a geoid model. The Danish National Space Institute performed new gravity readings to supplement the existing gravity database. Then all existing gravity data from the area was used for development of a local geoid model for the Fehmarnbelt. The geoid model is fitted to the height system FCSVR10 and to the ITRF2005 by the four new permanent GNSS stations, and the model can be used for conversion between MSL heights and ellipsoidal heights.

    The last item of the geodetic basis is the definition of a map projection, using a transverse Mercator projection. The projection is fitted to the area to obtain a scale factor as small as possible within the construction area. Also, a false Easting value was chosen to provide FCS Easting values within the construction area which are different from Easting values of the ITM, UTM, or Gauss-Krüger projections used in Germany and Denmark. Table 1 gives the defining parameters for the map projection.

     

    Permanent GNSS Stations

    The four permanent GNSS stations are established as geodetic-grade stations, as shown in the photo. Individually calibrated GNSS choke ring antennae are mounted on 3-meter tall concrete pillars, with foundations 3 meters into the ground at stations 1, 2, and 4, with predominantly silty glacial till of stiff consistency at about 0.70 (stations 1 and 2) and 1.70 meters (station 4) below soil surface. At station 3, foundations for the antenna monument are built 9 meters into the ground. Soil conditions are sandy at this location to about 7 meters below soil surface, where stiff glacial till is met. In geotechnical investigations and analyses carried out before establishment of the GNSS stations, the glacial till at the station locations was rated as a good to very good foundation ground, with little tendency to settlement.

    The concrete antenna monuments are surrounded with about 0.30 meters of styrofoam for thermal insulation. The monument head is bevelled with an angle of 30° from vertical, reflecting GNSS satellite signals striking the monument head underneath the antenna away from it, to further minimize signal multipath effects.

    The GNSS reference station receivers are capable of processing GPS and GLONASS L1 and L2, GPS L5, and Galileo E1, E5a, E5b, and Alt-BOC frequency band signals. Galileo signals can be processed when Galileo satellites are available; a firmware update on the receivers will be required. In view of the long-term demand for the FBPS (until 2020 or longer), its compatibility with Galileo signals in particular makes the system future-proof.

    GNSS reference station receivers, access points to power grids, and uninterruptible power supply are mounted in cabinets adjacent to the antenna pillars. Additional equipment in each cabinet comprises an industrial PC, Internet router, GSM/UMTS router, satellite communication equipment, transmitting and receiving radio modems, and a heat exchanger to cool the in-cabin room if required.

    At each station, a radio mast of about 10 meters height carries a satellite dish for wireless Internet access, and a Yagi antenna to broadcast GNSS correction data into the proposed construction area in the Fehmarnbelt. Radio masts are located directly north of the GNSS antennae.

    RTK Service

    To ensure accurate GNSS positioning, an RTK GNSS service has been established, based on GNSS data from the four new permanent GNSS stations (primary stations) as well as four GNSS stations located further away in Germany and Denmark (secondary stations), which existed previous to our work. Figure 3 shows the locations of the eight stations used for the RTK service. The stations relay GNSS data to the control center, which derives and transmits RTK correction data to surveyors in the project area with RTK rovers.

    The RTK service has been developed with focus on robustness, with two control centers at different addresses in Germany. Three different communication carriers provide data communication between the GNSS stations and the control centers, and RTK correction data is distributed to users in two different ways, via ultra-high frequency (UHF) radio and mobile Internet. Figure 4 shows the communication lines of the RTK service.

    FBPS RTK users who wish to receive RTK corrections via UHF radio require a UHF radio modem and antenna, in addition to an RTK rover. The four primary GNSS stations broadcast RTK correction data on four separate radio frequencies. By switching their radio modem to one of the frequencies, users receive the correction signal from the control center via the respective station. RTK corrections via UHF radio can be used where radio signals from one of the four primary GNSS stations can be received.

    From the users’ point of view an advantage of using UHF radio over using a mobile Internet connection is that the UHF connection is free-of-charge and can be collected from four different sources.

    Users who wish to receive RTK corrections via mobile Internet must connect via General Packet Radio Service (GPRS) and require a GPRS modem, antenna, and a subscriber identity module (SIM-card) in addition to their RTK rover. GPRS connections will be charged according to tariffs of the respective mobile phone network provider.

    Figure 5 shows areas of signal coverage. Areas 1 and 2 are covered by UHF radio and mobile Internet. Area 3 is covered by mobile Internet.

    The FBPS RTK service generates and broadcasts RTK corrections in two different modes: master-auxiliary corrections (MAX) mode, and virtual reference station (VRS) mode. MAX and VRS are two different calculation methods to generate RTK corrections in a standard format defined by the Radio Technical Commission for Maritime Services (the RTCM format). The version used for the FBPS RTK service is the RTCM version 3.1.

    With MAX corrections, the RTK rover does not send its position to the reference network software. The GNSMART reference network software calculates and sends MAX corrections to the rover. These contain the measurements from a master station and correction data from the auxiliary reference stations. The rover individualizes the corrections for its position, which means it determines the best suitable RTK corrections. RTK data in MAX mode can be received by users of RTK rovers via both possible types of connection, UHF radio and GPRS.

    With the VRS concept, the user’s RTK rover transmits its approximate position to the control centre, which returns to the rover observations or corrections of an individual VRS near the user’s position. Data is transmitted back and forth between the RTK rover and the control center. Therefore a two-way communication link must be established with VRS. Because the UHF radio connection is one-way, GNSS correction data in VRS mode can be received via digital cellular phone (GPRS) only. For data transmission via GPRS, the FBPS RTK service uses the networked transport of RTCM via Internet protocol (NTRIP).

    Multiple RTK rovers (that is, multiple users) can receive RTK corrections from the FBPS simultaneously with any of the connections described above, while every user may select his or her favourite connection type. The RTK service can be used with any commercially available geodetic GNSS receiver that is capable of processing RTK data.

    System Test and Results

    The RTK service was established during the spring of 2010 and was run in test mode May 12–July 31 to test system accuracy, signal coverage area, and signal availability.

    Accuracy. An error budget of the RTK service is provided including all known error sources and latencies in the system, and a description of how these errors are handled. The accuracy obtainable by end users is better than 1.0 centimeters in the horizontal and better than 1.8 centimeters in the vertical. Values are provided as one sigma, and are valid during normal ionospheric activity. Applying an RTK rover and RTK corrections received from the FBPS RTK service, users inside the coverage area can determine the coordinates of a marked survey point repeatedly with these accuracies.

    System inspection is carried out monthly. Part of monthly inspection is the visit of marked control points with an RTK rover. ISO 17123-8:2007 (ANSI, 2007) standard procedures are applied to determine control point coordinates.

    Coverage Area. The RTK service coverage area shown in Figure 5 is defined as the geographic area where the described accuracy can be obtained for end users at any time. Test measurements of UHF radio signal strengths from the four primary GNSS stations have been carried out onshore Lolland and Fehmarn, as well as offshore across the Fehmarnbelt (see photo). Modelled UHF radio signal broadcasting areas are closely verified during these tests.

    Availability. The positioning system and the RTK service are designed using necessary technology, redundancy, and back-up to ensure that the system is operational and available in the entire coverage area for more than 99 percent of the time. Availability is defined as the time where all elements of the positioning system are available for end users and where the described accuracy can be obtained for all users within the coverage area. Availability is evaluated in percent of time per day: the system must be available for at least 23 hours and 45 minutes per day. During the first year of operation it is accepted that RTK correction data from the system are available to end users for 97 percent of the time or more per day.

    A control segment has been established to constantly monitor RTK service accuracy and the availability of the system. The control segment is installed in such a way that all relevant output and data streams from the GNSS stations are available through the system’s website.

    Evaluation of availability is carried out automatically by the control segment, and an overall evaluation of availability is performed every month. Results from evaluation of availability during the test operation are listed in Table 2. During test operation, the required availability of 97 percent per day during the first year of operation was reached on all days. Availability only fell below 99 percent, as is the required availability during following years, for 5 out of 81 days (5.6 percent) of the test period.

    Conclusions and Outlook

    System tests results regarding accuracy, coverage area, and availability show that the positioning system and the RTK service fulfil all specifiecation requirements.The first RTK user was registered in July 2010, and the complete system is now being used for environmental, geotechnical, and geophysical investigations.

    User benefits of the FBPS include:

    • ensured consistent and uniform geodetic reference throughout the planning, construction and operation phases of the Fehmarnbelt Fixed Link, available to all stakeholders at any time;
    • seamless, real-time data flow from the point measurement at the construction site into computer-aided design (CAD) or geographic information systems (GIS);
    • simplified geodata transfer across interfaces between project stakeholders and project phases;
    • cost efficiency, reducing costs in both surveying and data management, particularly in precise operation of large, expensive offshore equipment, including during critical procedures in the construction phase.

    The positioning system for the Fehmarnbelt Fixed Link is an example of a homogeneous, consistent, coherent, and highly accurate GNSS-based positioning system. Comparable systems and services can be established and used for any major construction site or infrastructure project.

    Acknowledgments

    This work is funded by Femern A/S. The authors acknowledge contributions from the National Survey and Cadastre, Denmark, Danish National Space Institute, Land Survey Office of Schleswig-Holstein in Germany, German Federal Agency for Cartography and Geodesy, Richter Deformationsmesstechnik GmbH, Günther Steimann, and Ohms Nachtigall Engineering GbR. Also Mr. and Ms. Thomsen, Stadt Fehmarn, Mr. Henriksen, and Mr. Boserup for permitting establishment of FBPS GNSS stations on their property.

    Establishment, operation and maintenance of the GNSS stations and RTK service was entrusted by Femern A/S to AXIO-NET GmbH, with ALLSAT as subcontractor for implementation of the four GNSS stations (both companies in Hannover, Germany). Ramboll Arup JV was entrusted by Femern A/S with project coordination and geodetic consultancy, using AJ Geomatics as subcontractor. More information about the fixed link is available, and more on the RTK service.

    Manufacturers

    The RTK service is based on GNSMART software (GEO++ GmbH). The permanent GNSS stations are equipped with Leica Geosystems AR25 antennas and GRX1200+ receivers.


    Anna Jensen is owner and CEO of AJ Geomatics in Denmark. She holds a Ph.D. in geodesy and has worked with research and development within GNSS and geodesy for more than 15 years.

    Dirk Hermsmeyer holds a Ph.D. from the University of Hannover, and is a project management professional. He previously worked at ALLSAT and is now with the Chamber of Commerce in Lübeck, Germany.

    Bastian Huck is head of operations and quality management with AXIO-NET. He is a university-level geodesist and certificated project management practitioner with 10 years of experience in RTK projects.

    Jürgen Rüffer is co-owner and CEO of ALLSAT and AXIO-NET. He is a university-level geodesist, a publicly certified expert for GNSS positioning at the chamber of engineers in Germany, working with GPS and GNSS since 1977.

    Peter Skjellerup is chief advisor on geotechnology with Ramboll Denmark. He has worked with ground engineering for many years, and holds a M.Sc. in physics-geophysics from the University of Copenhagen.


    Note from author Anna Jensen (2/27/13):

    “Since publication of the article, the opening year for the Fehmarnbelt tunnel has been changed to 2021.”

  • On the Edge: Driving Reality Home

    By Tracy Cozzens

    A new navigation system looks to make driving safer by removing the need for drivers to look away from the road at their navigation device. With Wikitude Drive, as a driver moves down the road, the route is “drawn” onto the live video screen of an Android smartphone.

    How is this possible? Augmented reality.

    Augmented reality (AR) is a term for a live direct or indirect view of a physical real-world environment whose elements are augmented by virtual computer-generated imagery. The idea to blend augmented reality with navigation struck Philipp Breuss-Schneeweis, founder of Mobilizy, in 2008 when he was developing the Wikitude World Browser for the first Android Developer Challenge. Considering the awards Wikiude Drive has received so far, including being named Global Champion in the 2010 Navteq Challenge, it could be considered the next big advance in consumer navigation.

    Wikitude Drive, which launched at the end of 2010, works by attaching a mobile phone on top of a dashboard looking at the road. The application then overlays video captured through the camera with driving instructions. This allows users to drive through their phone, watching the road even while they are looking at directions.

    “With Wikitude Drive I don’t find myself looking for directions; the device itself guides me along the way,” said Nicola Radacher, product manager at Mobilizy.

    According to Breuss-Schneeweis, Wikitude Drive distinguishes itself from other navigation systems in two ways: First, due to the overlaying of the route onto the live video stream of the surroundings, the driver can easily recognize and follow the suggested route. Instead of looking at an abstract map, the driver is looking at the real world. The navigation system leads the driver through unfamiliar territory in a natural, real, and easy way.

    Second, Wikitude Drive solves a key problem that all other navigation systems have. These systems require the driver to take his eyes off the road to look at the abstract navigation map. Just by looking at the map screen for one second when driving at 100 km/h (62 mph), the driver is actually “blind” for 28 meters (92 feet).

    “Think about how much can happen in those precious meters. Since Wikitude Drive provides you with driving directions on top of the live video stream, you still see what is happening in front of you when looking at the display of your mobile AR navigation system,” Breuss-Schneeweis said.

    The AR system uses data from a smartphone’s GPS, compass, and movement sensors, retrieves information from its database, then displays the information over the camera feed. The company says millions of points of interest will also be displayed when a future version is integrated with Wikitude World Browser, the company’s AR browser for smartphone users.

    Wikitude Drive still can be used the traditional way. In some driving conditions — for example when driving in the dark — a drawn map is advantageous, and a driver can switch to the 3D map view by tapping the screen. Voice commands are also provided.

  • Opening Up Indoors: Japan’s Indoor Messaging System, IMES

    By Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan

    An indoor messaging system (IMES) has been developed to meet the challenges of indoor and deep indoor positioning, as a system that can be implemented in any device that has a GPS/GNSS receiver without hardware modification. IMES can provide reliable 3D position data with a single transmitter device without performing range calculation.

    The cost of embedding location data in portable electronic devices is so low that universal penetration can be foreseen in the next five years. Roughly 70 percent of the world’s population now uses approximately five billion cell phones. This number has doubled in the last four years. Future growth is expected at the same or even a higher growth rate.

    Due to the emergence of smart phones and location-based services (LBS), mobile phones are used not only for communications but also for many applications related to LBS, entertainment, and games. GPS/GNSS devices are included in mobile phones due to compulsory requirement of E911 and safety-and-rescue services by law in many countries for security and safety.

    Access to map data and value-added services using these map data is getting cheaper and eventually will be freely available. Major service providers like Google, Nokia, and Apple already provide access free of cost, and they increasingly focus on location as a core business construct.

    GPS/GNSS devices were designed to work outdoors, and most GNSS applications are limited to outdoor environments. However, GNSS reliability, availability, and accuracy have led to development of many new and innovative applications that are designed for use in both outdoors and indoors in a seamless fashion. Today, GNSS receivers are integrated in many other devices like mobile phones, navigation systems, personal navigation devices, game devices, security devices, and many LBS-related devices. These devices are increasingly used in indoor environments. Indeed, people generally spend much more time indoors than outdoors. Hence, it is extremely important to have a reliable system that can provide fairly accurate position data even in indoor and deep indoor locations.

    Current GNSS systems do not provide solutions for indoor and deep indoor environment with reliable accuracy of 10–20 meters. New modernized signals such as L5 do provide better position accuracy and better signal reception in indoor areas, but achievable positioning will still vary, and will continue to require more than four visible satellites with some assist data — and still be limited to soft indoors environments such as rooms with glass windows or walls. Limitations remain for hard and deep indoor environments.

    To surmount these obstacles and provide indoor navigation, various technologies such as pseudolites, assisted GPS, wireless networks (Wi-Fi), Bluetooth, RF tagging, and so on have been developed. However, these technologies have their own limitations and are not the most suitable tools for seamless positioning and navigation. Except for pseudolite and A-GPS, they are designed for communication, not for positioning or navigation purposes, but are used for navigation purposes since no other suitable technology exist.

    Pseudolite systems are currently in use for indoor positioning. While technically sound, a system needs at least four signal transmitting units. To cover a large area, it needs many transmitters suitably located and time-synchronized to one other, or their clock errors must be known. Pseudolite systems provide position data based on range calculation from the receiver to a number of transmitters, and this calculation is heavily affected by signal multipath. Table 1 compares IMES and pseudolites.

    IMES-Table1 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Table 1. Comparison between IMES and pseudolite.

    A-GPS is widely used in mobile phones to compute position data. A-GPS technology includes high-sensitivity signal processing to acquire weak signals and external assistance of data like time, approximate position, and satellite-orbit related parameters. Provision of assistance data requires a communication link between the receiver and the data source, for example, the mobile phone network itself. Thus, A-GPS will not be possible if there is no communication link.

    Normally, A-GPS provides 2D position data. The height data (if 3D output is available) will be highly erroneous. The accuracy of such position data varies from few tens of meters to few hundreds of meters. Also, the position data is heavily affected by signal multipath. Figure 2 compares IMES position and mobile phone position inside an office building. The A-GPS position error is about 300 meters in this case.

    IMES-2-B Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    FIGURE 2. Indoor position from high-sensitivity GPS and IMES.

    Wi-Fi is used for indoor positioning in many mobile phone devices. The phone provides position data from a built-in GPS receiver, a Wi-Fi device, cell ID, or a combination of any of these. Recently, position data from Wi-Fi has become popular for indoor as well as outdoor position, since Wi-Fi signals are so freely available. However, using these Wi-Fi signals requires registering the signal power and availability at reference locations. To do this, a huge number of Wi-Fi devices are registered driving around the city. Since these devices are basically installed for communication purposes, they can be relocated, removed, or new devices may be installed without any information to the users or service providers. Thus, continuous maintenance and updating of all these devices are necessary at certain time intervals. The coverage of Wi-Fi devices is not uniform and may vary widely from area to area, affecting position accuracy.

    Telecom service providers are considering the possibilities of seamless positioning technologies. They would like to have one single device that can provide 3D position data both indoors and outdoors, without additional power or cost, and with satisfactory 3D position information. If such a seamless positioning technology is available, it will undoubtedly generate a huge global commercial market. The availability of such technology will also aid development of new applications in location-based services, advertising, marketing, entertainment, and gaming.

    We have conducted research in indoor positioning for the past few years, beginning with pseudolite systems. We have developed IMES to meet the shortcomings of the technologies described earlier for indoor and deep indoor positioning. IMES for a seamless positioning environment can be implemented in any device that has a GPS/GNSS receiver, without hardware modification. IMES can provide satisfactory and reliable 3D position data with a single transmitter device without performing range calculation.

    Table 2 compares IMES with other indoor-position capable devices. IMES can provide the same accuracy even in deep indoor locations, whereas cell tower, A-GPS, and GPS cannot work in such areas. All other systems except IMES provide only 2D position data indoors. The height data from A-GPS is very unreliable and hence cannot be used.

    IMES-Table2 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Table 2. Comparison of IMES with other indoor positioning systems.

    IMES Concept

    The main concept of IMES is to transmit position and floor ID of the transmitter with the same RF signal as GPS. IMES transmits latitude, longitude, height, and floor ID by replacing the ephemeris and clock data in the navigation mes
    sage of GPS. A single unit of IMES is enough to get the position data, since the position itself is directly transmitted.

    Figure 3 shows the concept of seamless position data using IMES, where the same receiver can be used both indoors and outdoors without interruption. GNSS satellites provide positioning and navigations outdoors, while IMES provides indoor navigation. Since the signal structures of GPS satellites and IMES is the same except for the navigation message contents, the same receiver can be used for both cases. Current GPS receivers will be capable of receiving IMES signals with modification of firmware only to decode the navigation message. Figure 3shows the concept of seamless 3D route guidance.

    IMES-3 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 3. Seamless 3D route guidance using IMES.

    Signal Properties. The IMES signal is designed much like the GPS signal. It uses the same center frequency as GPS with an offset of +/– 8.2 kHz to minimize the possible interference from IMES to GPS signal. Ten PRN codes from 173 to 182 are assigned for IMES. These codes are provided by the U.S. government. Other signal-related parameters are the same as the GPS L1 C/A code signal. Table 3 shows IMES signal properties with respect to the GPS signal.

     Table 3. IMES signal properties with respect to GPS. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Table 3. IMES signal properties with respect to GPS.

    IMES has four different types of navigation message. The most significant is Type 1 as shown in Figure 4. It transmits latitude, longitude, height, and floor ID. The transmission of floor ID is a key factor for perfect 3D position data. Other message types are Type 0 (2-D position data with floor ID), Type 3 (short ID), and Type 4 (medium ID).

    Figure 4. IMES Message type 1, 3D position, and floor. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 4. IMES Message type 1, 3D position, and floor

    Interference Issue

    Since IMES shares the same frequency as GPS L1 band (1575.42 MHz), there is an interference level that IMES may have on GPS signals. This interference has been studied in detail by conducting experiments and simulations. Based on these studies and analysis, various methods have been considered to avoid harmful interference to GPS signal. To avoid such interference, IMES center frequency is shifted by +/– 8.2 Khz from GPS L1 band. This will have the least impact on the GPS L1 band signal. For example, if the IMES signal is –110 dBm (very strong) and the GPS signal is –142 dBm (very weak), the loss of GPS signal (C/N0) due to IMES is less than 2 dB. If the IMES signal is –120 dBm and the GPS signal is –142 dBm, there is no loss of GPS signal (C/N0). Based on this analysis, the IMES transmitter power must be controlled such that the maximum power to the receiver does not exceed –110 dBm at a distance of 3 meters from the transmitter. Figure 5 shows the guideline specified in the QZSS IS document for setting the transmitter effective isotropic radiated power (EIRP)based on location.

    Figure 5. IMES transmitter power setup guideline in QZSS IS document. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 5. IMES transmitter power setup guideline in QZSS IS document.

    Figure 6 shows the signal propagation loss for transmitter power of –70 dBm for various propagation loss-factor values of n. Figure 7 shows path loss for various transmitter power for the same loss factor, n = 2.5. These graphs shows the maximum power that shall be used to cover an area without exceeding the maximum power level. If a single unit of IMES cannot cover the complete area, then multiple IMES units will be deployed to cover the entire area with suitable power level. These graphs serve as a guideline for setting transmitter power.

    Figure 6. Signal path loss for –70 dBm signal for different path loss coefficient, n. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 6. Signal path loss for –70 dBm signal for different path loss coefficient, n.
    IMES-7 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 7. Signal path loss for path loss coefficient, n = 2.5, for different transmitter power levels.

    The signal propagation loss is calculated using the following equation; the gain of transmitter and receiver antennas is considered as unit gain (0 dB).

    IMES-E1 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan

    Hence, the equation depends on distance from the transmitter, d, and the propagation loss factor, n. The value of n is 2 for free space and increases for areas with objects that obstruct the signal. An office with soft partitions may use n = 2.5. The graphs can be used as a guideline to estimate the transmitter power to cover an area within the allowed power levels.

    Application Areas

    IMES can be used wherever indoor position data is required. It depends upon the application for that particular location as well. For example, an infrastructure-related safety application should have IMES installed at all elevators, escalators, staircases, emergency exits and routes, fire-fighting unit locations, and so on. Here are some of places where IMES might be used:

    • Every room of a building, to provide exact room location.
    • At entrances, exits, elevators, escalators, staircases, public facilities, and corridors for indoor navigation.
    • At every emergency exit for guidance.
    • Along hallways and lobbies at set intervals to guide the user.
    • In front of shops for advertising and information.
    • In sign posts to provide user’s location and guidance.
    • Complement other positioning systems like Wi-Fi, RF Tag, UWB, and so on.
    • As an indoor ground control point for surveying of large and multi-storey buildings.
    • With security cameras to provide accurate position data.
    • In factory production lines for automated control of moving objects.

    Business Perspective

    IMES technology was developed with the guiding concepts of low-cost global implementation and ease of installation and use. Low cost on the transmitter side is achieved by developing large-scale integratin (LSI) chips and IMES installation, setup, and database management tools. At the receiver side it is achieved by design of IMES signal so that existing GPS receivers in mobile phones, PDAs, or any other devices can use IMES by modifying only the firmware. The signal is designed so that it can adapt to other GNSS signals available in the future, for example, Galileo, QZSS, or Compass signals, requiring only firmware modification. Global implementation is made possible by signal design compatibility with existing GPS or GNSS signals. Ease of use is achieved again by signal design: one IMES transmitter can provide 3D position data, including floor information, with reliability and accuracy of a few meters even in deep indoor locations.

    The development of IMES LSI chips (IMES transmitter) will also lead to development of value-added products for many consumer household appliances. For example, the green energy concept produced low-power LED lightbulbs. IMES chips can be installed in LED bulbs at very low additional cost. Similarly, it can be built in many other products like power socket devices, security devices, timing devices, and sensors where position data is also critical. This will provide an opportunity for the manufacturers to provide value-added products to users with indoor positioning devices. Not only electrical products but some construction materials or interior decoration materials like gypsum (dry
    wall) boards can be made with built-in IMES chips. Installation of one piece of wallboard with an IMES built-in chip can provide position data in the room, reducing installation cost while not affecting the interior design of the room.

    Implementation of IMES will also lead to new applications in the field of location-based services and applications where position data are necessary. It can also lead to new applications using IMES as an indoor electronic ground control point (GCP) in large buildings and indoor areas.

    Chip Development. To reduce IMES transmitter cost, the IMES LSI chip has been developed and will be available by the end of the third quarter of 2011. This will reduce overall cost and size, and create platforms to develop value-added products integrating with other devices and systems. The chip is designed for global communications systems like personal handy-phone system (PHS, a mobile phone communication system developed in Japan), CDMA, and GSM. Figure 8 shows a block diagram of the chip transmitter.

    Figure 8. IMES large-scale integration chip block diagram. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 8. IMES large-scale integration chip block diagram.

    The basic specifications of the LSI chip are: size, 12 x 12 millimeters; power, to be determined; maximum transmit power, –30 dBm or –60 dBm (user selectable); frequency, L1 band, 1575.4282 MHz or 1575.4118 MHz (user selectable); PRN codes, 173–182 (user selectable); signal type, GPS L1C/A, with upgrade capability to other GNSS signals.

    Installation and Management

    An IMES installation, setting, and management system has been developed to facilitate deployment. The main purpose of the system is to provide IMES transmitter position data (latitude, longitude, height) without conducting precision surveys, thus reducing installation, setting, and management costs. The system helps locate optimum locations for IMES transmitter siting, control transmitter EIRP power, set PRN IDs, and assign position data. The system can also use various types of map data sources to generate necessary floor data or indoor maps in 3D. The inputs can be either 3D vector data or 2D raster images, or even paper maps.

    The overall system consists of four sub-systems:

    IMES Setup Tool (ISET). This tool is used to set up the IMES transmitter. It provides two basic functions: to set up signal-related data (setting PRN code, transmitter power, navigation message rate, and so on) and to set up message-related data (position data, floor data, message types and their contents, message sequence, and so on). The R&D version of IMES also allows transmitting some special data for research and development purpose. It is possible to change the preamble value different from GPS, load a different PRN code table than IMES, change the navigation message data rate, generate a BOC(1,1) signal to test L1C-like signals, and change the RF frequency. The setup tool also has user-access management so that only authorized users can change certain sensitive data like PRN code, position data, and transmitter power.

    IMES Database Management Tool (IDBM). This tool simplifies installation and management by providing a necessary database including a building-related database, a service-provider database, a device-related database, other integrated sensors database (if any), and a signal-related database. Since IMES is controlled and managed, guaranteed and authorized services can be provided for dedicated applications. This enhances the reliability of an IMES-based positioning system for infrastructure, security, and safety-related applications.

    3D Mapping Tool (IMAP). This tool, shown in Figure 9, provides a 3D map database for IMES either for implementation or end-user applications. The mapping tool can use 3D vector data (for example, existing DXF files), raster image data, or direct user input. A laser scanning system with CCD camera is used to generate 3D data if existing data is not available. The tool creates walls, windows, doors, ceilings and other smaller objects from the laser data. If data are available in paper drawings, they are scanned to create raster images before digitizing them into vector format.

    IMES-9 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 9. 3D Map Database Development System.
    Figure 10. Concept of IMES database for implementation, setting and management. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 10. Concept of IMES database for implementation, setting and management.

    The system will ultimately create a 3D database of a building at floor level that can be linked with external databases. Figure 10 shows the overall concept of the IMES database system that includes both IMES database and 3D map database. The two database systems are linked by a relational database system. Any update in the map database can be reflected into the IMES database.

    Signal Propagation Loss Tool (IPMODEL). This tool simulates the signal level where IMES will be set up. It is necessary to have optimum deployment of the transmitter to cover the area as large as possible within the allowed power level. Although the allowed maximum EIRP power level is –64 dBm for Japan, the approach is always to use the least power possible to cover the area, to avoid any possible harmful interference to other systems as well as to limit the availability of the signal to only the desired area.

    The following equation is used to calculate the signal path loss which is based on Frii’s free-space path-loss model.

    IMES-E2 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan

    GT is the transmitter antenna gain. The receiver antenna gain is assumed to have unit gain (0 dB) and hence not included in the model.

    L0 is the power loss at 1 m distance and is given by 20 x log10(signal wavelength) — 20 x log10(4*pi).

    N is the path-loss factor, which is 2 for free space, 2.5 for office room with soft partition, and 3.0 for rooms with hard partition.

    Ri is loss due to i number of reflections by objects.

    Pj is loss due to j number of penetrations through objects.

    Figure 11 shows the propagation-loss tool flowchart. It uses 3D map database provided by the 3D mapping tool and database from the database management tool. It also uses antenna gain pattern and material electrical properties to compute the power loss due to reflection and penetration. Figure 12 shows the signal propagation output from the model for a building lobby. Figure 13 and Figure 14 show the output from the propagation loss results from the actual measurement and model output, respectively. The results match within a difference of few dBs.

    IMES-11 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 11. Path Loss Tool flowchart.
    Figure 12. 3D view of signal power in a building lobby. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 12. 3D view of signal power in a building lobby.
    Figure 13. Actual signal power measured at different locations in the lobby shown in Figure 12 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 13. Actual signal power measured at different locations in the lobby shown in Figure 12
    Figure 14. Signal power output from the propagation loss tool at the same location shown in Figure 13 Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 14. Signal power output from the propagation loss tool at the same location shown in Figure 13

    Experiments and Demonstrations

    Experiments and demonstrations have been conducted to validate the IMES concept, uses, and applications. Early experiments validated the
    concept, message design, and interference analysis. Later experiments focused on actual implementation for infrastructure, and social-network and location-based applications. Pilot projects have been conducted in collaboration with the Japanese government to test IMES capabilities for seamless positioning and navigation and for social infrastructure platform.

    The Free Mobility Project in Kobe is the biggest social experiment using IMES for seamless navigation under the sponsorship by the Ministry of Land, Infrastructure, Transport, and Tourism. The project was conducted in an underground shopping mall of Kobe railway station. Shopping mall visitors were asked to participate in the navigation using IMES-capable mobile phones. Most visitors could follow the route they had chosen or find the destination point using the IMES set-up.

    A total of 70 IMES transmitter units were installed at locations including ticket counters, elevator entrances, emergency exits, fire-extinguisher locations, staircases, station entrances, and alleys of the shopping mall. Figure 15 shows a part of the IMES transmitter location map. It covers one of the sections of the shopping mall. Figure 16 shows various locations where IMES transmitter devices were installed. As shown in Figure 17, intelligent 3D route guidance can be performed based on user preference. For example, a user in a wheelchair must be guided by a route that has no staircases, shown by green route in the figure, to reach the destination. A pedestrian can be guided by red route, which is the most direct route to the destination.

    Figure 15. IMES transmitter location map to cover the underground shopping mall in Kobe Station. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 15. IMES transmitter location map to cover the underground shopping mall in Kobe Station.
    Figure 16. Installation of IMES near the station entrance and emergency exit. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 16. Installation of IMES near the station entrance and emergency exit.

     Figure 17. Intelligent 3D route guidance using IMES. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 17. Intelligent 3D route guidance using IMES.
    Figure 18. Seamless navigation by mobile phone using GPS and IMES. Source: Dinesh Manandhar and Hideyuki Torimoto, GNSS Technologies, Inc. Japan
    Figure 18. Seamless navigation by mobile phone using GPS and IMES.

    The distribution of each IMES transmitter is done in such a way that it covers a radial distance of 10 to 20 meters. The deployment density of IMES depends on the location environment. If an IMES device is located near the entrance, the coverage distance will be around 10 meters to minimize transmitted power. IMES devices in deep indoor locations can cover a radial distance of about 15 to 20 meters.

    Commercially available mobile phones with a firmware update for IMES were used to receive the IMES position data. The phones also included the shopping mall and station map including related databases for various applications.

    Conclusions

    IMES can provide reliable and guaranteed 3D position accuracy, including floor information. IMES signal design is done in such a way that it can use existing as well future GPS/GNSS receivers without any hardware modifications. Necessary implementation, setup, and management tools are also developed to facilitate IMES installation and to minimize the cost so that large-scale global implementation is possible. IMES LSI chips are being developed for large-scale implementation. IMES will also help in developing many other location-based applications and services. IMES evaluation kits will soon be available for joint R&D projects.

    IMES technology-related patents have been filed in Japan and many other countries. The basic patents have already been approved in Japan. GNSS Technologies invites academic institutions to participate in joint R&D projects.


    Dinesh Manandhar is a visiting researcher at the University of Tokyo, where he received his Ph. D, and a senior researcher at GNSS Technologies Inc. He is one of the designers of IMES message structure and involved in developing indoor navigation system based on IMES for seamless navigation environment. He can be reached at [email protected].

    Hideyuki Torimoto is the president of GNSS Technologies Inc. Japan. He established Trimble Navigation Japan and Weathernews Inc. in 1986. He also established the Research Forum on Social Infrastructure for Advanced Positioning (NPO) in 2003 and the Satellite Technology Laboratory in Tokyo University of Marine Science in 2004. He served as Satellite Division Member of ION for 2003-04. He can be reached at torimoto @ gnss.co.jp.

  • Indoor Location on the Move

    It’s coming. Indoor location, which has been stymied by the limitations of GPS and lack of mapping, is finally getting some legs and is heading us towards seamless navigation. A shopper is guided from home to an empty parking space at the mall, and the navigation doesn’t miss a beat as he heads inside and gets directions to a particular store, and perhaps to a given shelf. Today, the location of a wireless device usually cannot be determined more precisely than the building it is within. In tall or sprawling venues like arenas, malls, dormitories, or apartments this is a critical problem for emergency personnel trying to locate a person who has dialed 911. Mobile marketing and social network applications have also been constrained by problems in obtaining indoor location.

    Finding Cherries. Aisle 411 is a shopping app with local search and navigation that helps users find a particular item within a store. The app navigates to the threshold of a store and then provides a diagram of the interior (essentially a paper map) with a drawn path to the desired item, for instance, a jar of maraschino cherries. Apps like this provide a good service, but are held back by the nascent state of indoor navigation. Geo-coded locations of indoor stores often aren’t available. Apps that are more granular and attempt to locate goods within a store face greater challengers. Inventory is moved around and geo-coding is infrequent, hence the diagrams of Aisle 411. Some applications like Aisle 411 utilize crowd-sourced maps, in addition to venue-provided maps.

    Height Counts. Products are being introduced to determine the elusive “z” plane, or in layman’s terms, height. Location systems work well at determining the “x” and “y” axis but can’t distinguish between a location on the first floor and one on the twentieth floor. Polaris is releasing an indoor location offering in the second half of this year. In addition to Polaris’ existing location technology, the solution also uses femtocell and distributed antennas without necessitating a client on the handset. Polaris can distinguish a position within a range of five floors. Infrastructure provider CommScope introduced GeoLENS Indoor, a solution that integrates with wireless indoor coverage systems including distributed antenna systems (DAS), repeaters, and other RF equipment.

    Inside Job. Micello, a small start-up, has been addressing the indoor mapping issue. The free Micello app contains the maps of the insides of large structures including shopping malls, airports, hospitals, and business campuses. So far, Micello has mapped 215,545 structures in 2,200 locations.

    3D Indoors. Navteq showed off Destination Maps’ indoor navigation system at the International CTIA Wireless 2011 show, held in Orlando March 22-24 . The maps are available in 200 U.S. shopping malls and provide detailed 3D guidance and information within indoor structures. The system will use transmitters within buildings that communicate via Bluetooth and Wi-Fi.

    Monster in the Room. Mobile users aren’t satisfied by industry privacy measures. “About half the people in a study of 1,500 consumers we interviewed are concerned about who knows their location, particularly businesses,” says Kristi Crum of Verizon. Subscribers want to understand how their data is being used, whether is it being aggregated, or if it is being shared personally or kept totally private. It will only take one or two high-profile events involving misuse of data before there is fallout on our industry, warns Crum.

    Monetize, Monetize, Monetize. Mobile payment systems will become ubiquitous. Google is collaborating with MasterCard and Citigroup to embed contactless near-field communication (NFC) payment technologies in Android. Financial service companies are becoming players in mobile advertising and will likely provide advertising networks like Google with consumer data that will enable more targeted advertising. Google is starting a pilot in New York and San Francisco and is paying for thousands of point-of-sales readers for stores in the regions. Google will go head-to-head against ISIS, a nationwide mobile commerce NFC venture that includes Verizon, AT&T, and T-Mobile. ISIS plans to introduce services within the next 18 months.

    GPS Interference Concerns Grow. The Department of Defense and the Department of Transportation have added their voices to concerns over LightSquared’s hybrid satellite-terrestrial LTE network, which they think may interfere with GPS systems. In a letter to FCC Chairman Julius Genachowski, the agencies state they were “not sufficiently included” in the development of LightSquared’s initial work plan to address potential GPS interference issues caused by its network. An FCC spokesman tried to ease concerns by indicating that LightSquared will not be permitted to go forward until potential GPS interference issues are addressed.

    At CTIA, LightSquared acted as though there were no hurdles in its way. CEO Sanjiv Ahuja asserted that the company will beat its build-out goals with a commitment to cover 100 million POPs by the end of 2012, 145 million by the end of 2013, and 260 million by the end of 2015. “We are not only committed to meeting these milestones, we are today positioned to exceed them,” Ahuja said.

    DoCoMo. There was a large empty space where Japan’s NTT DoCoMo’s CTIA booth would have stood. DoCoMo issued a statement that it was skipping CTIA to focus fully on delivery of mobile services for relief efforts. In the bare exhibit space, a solitary vase stood filled with cherry blossoms.

  • A Free GIS Tool Just Got Better

    A few months ago, I wrote a little about ArcGIS Explorer (AE), a free GIS viewer from Esri. It’s a nice tool for non-GIS users who want to view GIS data. Looks like another feature is creeping into AE to make it a bit more powerful. Bern Szukalski, product strategist and evangelist at Esri, blogged earlier this week about new functionality in AE that will allow direct GPS support. In other words, you can connect a GPS receiver (Bluetooth or otherwise) to a device running AE and be able to visualize and record GPS data as its tracking.

    Borrowing from Bern’s Blog, following is a 2D map as he was driving, showing the waypoints and tracks as he was moving. He said he set AE to collect a GPS point every 10 seconds, centering the map as he moved. GPS waypoints and tracks are stored as notes.

    (Click to enlarge.)

     

    The next screen shot shows his path in 3D. Green represents GPS points/paths collected by mouse click. Yellow represents GPS points/paths collected at 10-second intervals.


    (Click to enlarge.)

     

    Bern blogged that he was using a borrowed $18 USB GPS receiver in this example. Don’t pay much attention to the accuracy (or inaccuracy) of the GPS positioning. He could have just as easily connected a sub-meter or centimeter-level GPS receiver (outputing NMEA 0183 messages) and had enough precision to accurately position the center of a 6-inch water meter cover plate on the sidewalk. That’s where this is headed, folks.

    A Quick Note on the Annual GITA Conference

    I didn’t attend the annual GITA (Geospatial Infrastructure Technology Association) conference this year, but I received several reports that this was the last GITA annual conference. That’s pretty sobering (but not surprising), given that it was the 34th such conference that started in the late 1970s. I blogged last year that I thought this years was going to be a really tough one because it wasn’t co-locating with another conference as it was last year with ACSM (American Congress on Surveying and Mapping). Although the demise of the GITA annual conference was predictable, it’s still sad to see it go. Last year, I thought the technical presentations were quite good and clearly demonstrated a need for continuing promoting and developing geospatial apps in the world of infrastructure. Without the GITA conference, I wonder where these folks will go to share their knowledge and experiences. I’d like to reiterate that there are too many niche conferences related to GIS. GIS folks can’t afford the time or expense, and neither can GIS sponsors/vendors, to attend three different small GIS conferences in a 90-day window. What I wrote a year ago is just as relevant today.


    Let’s discuss conferences for a minute

    As good as the content was for both the GITA and ACSM conferences, the attendance was horrible. If there were 1,000 people there (for both), I’d be surprised. At this pace of decline, something’s got to give. I attended the annual GITA conference in Seattle in 2008. If I recall correctly, there were about 1,400 attendees. This year, in 2010, there were maybe half of that including exhibitors. Next year, the GITA conference is operating as a stand-alone conference in a suburb of Dallas, Texas. I predict it might be even worse than this year. The ACSM annual conference is not doing any better, but rumor has it will co-locate in 2011. The two conferences won’t be co-located next year. It’s a time for conferences to start working together.
    Size Matters

    It’s a vicious cycle. The fewer attendees there are, the less interested vendors are in exhibiting and sponsoring the event. Each year, attendance erodes until it doesn’t make sense any longer. Now is the time for conference consolidation, especially in the GIS industry. GIS is tough to segment because it stretches across so many industry boundaries. In April alone, there was the GIS-T (GIS in Transportation) conference in West Virginia, the GITA/ACSM co-located conference in Phoenix and the ASPRS (American Society for Photogrammetry and Remote Sensing) conference in San Diego. All of these are small conferences that are becoming increasingly difficult to justify, financially, for both the operators and the attendees. I can safely say that attendees and vendors certainly would prefer to attend one conference in one location that includes GIS-T, GITA and ASPRS rather than three separate conferences spread out all over the US. They need to consolidate at the same time in a single location.

     


    I suppose the demise of the annual GITA conference is part of the consolidation I wrote about. Being accelerated by the current economy, people will just stop attending some conferences and pick/choose the conference(s) they feel fit their needs the best.

     

    Upcoming Events/Publications:

    Following are a few upcoming events you might be interested in:

    Webinar: April 21st. “LightSquared and GPS: Our Story So Far”. I’ll be participating in a moderated discussion about this issue. If your organization relies on GPS, I strongly encourage you to register. If you aren’t available during that time, register anyway and you’ll be provided a link to view the webinar at a time that’s convenient to you.

    Space Weather Workshop: April 26-29. I’ll be presenting at this conference and blogging about what I hear in order to keep you informed about space weather as the next solar cycle warms up.

    Western Forester: April issue. Look for my article and accompanying articles on Lidar, laser rangefinders, GPS and other emerging technologies that concern the forester and other natural resource professionals.

     

    Thanks, and see you next week.

    Follow me on Twitter at http://twitter.com/GPSGIS_Eric