Tag: flight test

M3 Systems, Pipistrel and Volocopter complete air traffic tests in France
The flight test is the third of several to simulate a variety of real-world scenarios that demonstrate how UTM and ATM intersect with multiple aircraft types.

M3 Systems, Pipistrel and Volocopter have completed their first joint flight test campaign in France at Pontoise airfield.

The week-long flight tests simulated three different avoidance maneuvers in real-world situations where unforeseen circumstances occur, such as a complete airport or vertiport closure, an unavailable final approach and takeoff area, and traffic deconfliction.

M3 Systems was created from engineering activities in GNSS and consulting activities in air traffic management (ATM), including for uncrewed aircraft. M3 played a role in Galileo signal definition, among other projects for Europe’s various space agencies. Pipstrel is a light aircraft manufacturer specializing in electric propulsion, and Volocopter specializes in urban air mobility (UAM) systems.

The joint campaign among the three companies — with French partners Groupe ADP and its subsidiary Hologarde — aimed to achieve smooth interaction within and between the new lower airspace’s unmanned traffic management (UTM) and standard civil aviation ATM systems.

The Boreal system is a fixed-wing UAV with high-endurance and heavy payload capacity. (Photo: M3 Systems)

The aviation industry is experiencing an innovation upsurge driven by technology and societal pressure for new forms of aviation focused on sustainable, digital and autonomous air mobility. The resulting solutions will generate a significant increase in traffic density in the lower airspace.

Because existing ATM systems are not designed to handle such volumes or digitalization, coordinating existing and new traffic management systems for brand-new aircraft integration will ensure efficient large-scale operations. This includes commercial, general and drone aircraft for cargo and passenger flights, both crewed and uncrewed.

The CORUS-XUAM project, funded by the European Union’s initiative Single European Sky ATM Research (SESAR) Joint Undertaking, focuses on solving the challenge of conventional and new traffic management system integration and consists of 19 partners and 11 third parties. M3 Systems, Pipistrel and Volocopter all completed individual flight-test campaigns before this event to bring their aircraft in line with the U-space services.

A week of flight tests ended with an Open Day air show and presentations. (Photo: M3 Mobility)

The CORUS-XUAM flight test conducted at Pontoise airfield near Paris is the third of several flight tests to simulate a variety of real-world scenarios that demonstrate how UTM and ATM intersect with multiple aircraft types.

Moreover, the CORUS-XUAM project will continue to proactively test and create a safe and controlled lower airspace under the European Union’s ambitious Single European Sky (SES) initiative throughout 2022.

The successful flight tests at Pontoise airfield were conducted with M3 System’s Boreal remotely piloted aircraft system, Pipistrel’s crewed Velis Electro, the only type-certified electric aircraft in commercial service in the world, and Volocopter’s fullscale, remotely piloted 2X prototype. Pipistrel uses the conventional ATM tower and system while Volocopter and M3 Systems use the UTM system. The following three flight scenarios were tested:
- The unexpected occupancy of a final-approach-and-takeoff plan and aircraft diversion because of priority landing of another aircraft (Pipistrel and Volocopter aircraft).
- The diversion of a flight path because of the closure of an airport or vertiport (M3 Systems).
- The diversion of a flight path with two aircraft flying the same path (M3 Systems and Volocopter aircraft).
“These successful tests confirm that our Boreal UAS will be an enabler for future XUAM operations in situations where aircraft need to safely divert paths to another vertiport due to an unforeseen closure or another aircraft in the air,” explained Marc Pollina, M3 Systems CEO. “By providing rerouting demonstrations and tactical communications with U-Space service providers, M3 Systems can support future coordination between AAM and airport operators.”

Pipistrel is “As the manufacturer of the only type-certified electric aircraft in commercial service in the world, proud to take part in technical projects that shape the vision of air mobility and make progress in a meaningful way,” said Gabriel Massey, Pipistrel president. “The CORUS project and Paris demonstrations clearly show how UAM vehicles will be able to fly safely in regular airspace post-2030 and will help to unlock new lower-noise and lower-emission air passenger and air cargo services.”

In 2019, Volocopter tested its 2X ATM integration at Helsinki airport and was actively involved in the development of the European U-Space Concept of Operations, according to Oliver Reinhardt, Volocopter’s chief risk and certification officer. “Building an efficient ecosystem around UAM is Volocopter’s mission, and connecting ATM/UTM integration with our digital platform, VoloIQ, is poised to be an integral part of bringing UAM to megacities worldwide,” Reinhardt said. “I am looking forward to the next CORUS-XUAM test flights later this year in Germany and what we can achieve there.”

The project has received funding from the SESAR Joint Undertaking under the European Union’s Horizon 2020 research and innovation program under grant agreement No. 101017682.
September 29, 2022
Air Force PNT AgilePod achieves flight test objectives
News from the Air Force Research Laboratory

The Air Force Research Laboratory’s complementary positioning, navigation and timing (PNT) AgilePod prototype achieved three important objectives in flight tests conducted at Edwards Air Force Base Nov. 1-10, 2021.

PNT AgilePod helps develop advanced navigation technology independent of GPS, according to Maj. Andrew Cottle, Air Force Strategic Development Planning and Experimentation (SDPE) office. This technology provides reliable, resilient PNT navigation signals through alternative means, increasing mission effectiveness in scenarios where access to GPS is not guaranteed.

The test team — representing a broad base of Air Force, Navy and vendor organizations — successfully executed eight sorties aboard a T-38C aircraft, which included:
- the first test of the PNT AgilePod on a high-dynamic-range platform
- the first test of fully remote interfacing and alt-PNT data transmission
- the first demonstration of overland/overwater transition performance.
He said the tests demonstrated the operational utility of a fused alt-PNT system incorporating multiple technologies within a single government-owned open-architecture prototype.

A PNT AgilePod attached to a T-38C successfully demonstrated remote interfacing and alt-PNT data transmission, as well as performance over land and water. (Photo: USAF/2nd Lt. Bowen Lin, 586th Flight Test Squadron)

AgilePods Designed for Flexibility

AgilePods are comprised of a series of compartments and can be configured to meet a wide variety of mission requirements for many aircraft platforms. Experimenters can fill the spaces with plug-and-play sensors they need for a mission — high-definition video, electro-optical and infrared sensors, and devices with other capabilities — including PNT.

The AgilePod has an open hardware architecture. For the complementary PNT prototype, it was combined with an open software architecture that allows a wide variety of alternative PNT technology to integrate and pass information. These capabilities enable rapid integration of sensor technologies through standardized software and hardware interfaces, allowing the pod to seamlessly integrate on platforms that leverage the standard architectures.

In this way, one pod can perform hundreds of different mission sets with additional benefits of cost savings and increased sustainability, Cottle said.

The project directly supports the AFRL PNT Enterprise and the Air Force PNT Cross-Functional Team as they work to ensure reliable navigation within GPS-contested operational scenarios critical to the success of future Air and Space Force missions.

A PNT AgilePod attached to a T-38C successfully demonstrated remote interfacing and alt-PNT data transmission, as well as performance over land and water. (Photo: USAF/2nd Lt. Bowen Lin, 586th Flight Test Squadron)
January 3, 2022
Riding Earth’s magnetism: An alternative approach to PNT

There are many ways to navigate. For most applications, none surpass the accuracy, affordability and convenience of satellite navigation.

However, given the threats to GNSS from spoofing and jamming, and the possibility that GNSS satellites could be destroyed accidentally by space debris or intentionally during a war, the search is on for alternative sources of positioning, navigation and timing (PNT) data.

Potential alternative PNT (APNT) approaches include computer vision, terrain contour matching (TERCOM, which was used to guide cruise missiles in the 1970s and 1980s), and using magnetic anomalies (MAGNAV).

Diverse animals — such as sea turtles, spiny lobsters, and birds — use magnetoreception for orientation and navigation. However, while animals likely perform wayfinding using the direction of the magnetic field, similarly to how humans use a compass, high-resolution maps used in conjunction with atomic instruments enable us to perform absolute positioning to tens of meters, explained Major Aaron Canciani.

Canciani, an assistant professor of electrical engineering at the Air Force Institute of Technology, has been designing algorithms for MAGNAV flight testing for several years.

Earth’s crustal magnetic field varies from location to location as much as topographic features do and, like them, it changes very little over time. However, unlike topographic features, which only occur on the third of the planet’s surface covered by land, magnetic variations also occur on the oceans. This makes them potentially very useful as landmarks to the Navy and Air Force. Magnetic variations have the additional benefit that they cannot be jammed or spoofed.

NOAA’s EMAG2 World Digital Magnetic Anomaly Map. (Image: NOAA National Geophysical Data Center)

Just like other features of Earth, magnetic fields can be mapped, using scalar magnetometer sensors to measure their strength and direction. In fact, government agencies and mining companies have been making these maps for many decades, for geological exploration and other purposes, though mostly on land.

Conversely, these maps can be used to navigate by comparing the data from magnetometers to the map, just like cruise missiles used to use on-board radar altimeters to match the contours of the land beneath them to contour lines on a digital map and navigators on vessels in shallow waters compare the depths reported by their fathometers to those marked on a chart.

Before this approach to navigation can be widely implemented, however, magnetic maps need to greatly improve in coverage and quality. In addition to magnetic maps and sensors, MAGNAV also requires sophisticated algorithms and careful calibration, to do such things as subtract errors from space weather and the local magnetic field of the aircraft or ship.

The greater the platform’s speed, the greater MAGNAV’s accuracy, because the magnetometers can collect more varying magnetic information per unit of time of INS drift, Canciani explains. On a platform moving fast and at low altitudes, MAGNAV could achieve 10-meter accuracy. In less ideal conditions and relying on lower quality magnetic maps, the accuracy could be as low as one kilometer — which is sufficient for many missions, such as navigating ships at sea.

Off-the-shelf scalar magnetometers about the size of a quarter have already been flight tested. Corporations, the military and civilian government agencies such as NOAA, NASA and NGA already have suitable magnetic maps, though they need to be improved and expanded, particularly at sea. This would require gathering new data using calibrated sensors on airplanes, ships and submarines.

Could magnetic sensors be installed on thousands of aircraft, land vehicles and sea vessels to collect magnetic data during their routine operations? “With proper calibration, yes, but it should not be downplayed how difficult it is to get 1 nanoTesla measurements on a platform,” Canciani said. “Mapping and navigation are inverse problems so any platform that has been calibrated well enough to navigate could, in turn, also be used for mapping.”

However, he points out, the task is much more complicated than just putting a magnetometer on a platform. “Getting clean data on complex platforms remains the largest challenge for magnetic navigation,” Canciani said, “although we are making excellent progress with projects like the Air Force Accelerated AI program with MIT and Lincoln Lab. In this project we are using state of the art scientific machine learning approaches to calibrate complex magnetic fields on operational platforms. Without excellent calibration algorithms the only sure-fire way to get clean magnetic data is putting a sensor out on a boom or wing-tip, which might not be practical for all use cases.”

Two F-16 Fighting Falcons fly over Edwards AFB during a 2009 air show. (Photo: U.S. Air Force/Chad Bellay)

Canciani admits that MAGNAV is often met with skepticism but hopes that realistic testing on realistic platforms will lead to more interest and funding for this approach.

While some such testing has already been performed using private survey aircraft, a much more important test will take place in September, when F-16s from the Air Force Test Pilots School will fly MAGNAV sensors and software over a test range next to Edwards Air Force Base in Nevada.

July 20, 2020