GPS World

Tag: GPS clock

  • 2 SOPS continues GPS modifications this summer

    2 SOPS continues GPS modifications this summer

    Capt. Adam Moody, 2SOPS GPS Operations Support flight commander, and Staff Sgt. Carl Ellinger, 2 SOPS GPS mission chief, review a checklist of procedures for a transfer operation at Schriever Air Force Base. (U.S. Air Force photo/Dennis Rogers)
    Capt. Adam Moody, 2 SOPS GPS Operations Support flight commander, and Staff Sgt. Carl Ellinger, 2 SOPS GPS mission chief, review a checklist of procedures for a transfer operation at Schriever Air Force Base. (Photo: U.S. Air Force photo/Dennis Rogers)

    The 2nd Space Operations Squadron (2 SOPS), based at Schriever Air Force Base, will implement the GPS Issue of Data, Clock software modification this summer in accordance with established guidance, according to Rick Hamilton, CGSIC Executive Secretariat, U.S. Coast Guard Navigation Center.

    The modification is in compliance with GPS Interface Specifications IS-GPS-200, which is published for manufacturers to ensure continued device compatibility.

    As the largest Department of Defense spacecraft constellation, operators must modify processes, software and operations to meet the ever-growing demand for GPS signals. The squadron conducts software modifications regularly to support the constellation.

    The modifications are primarily transparent to users, specifically those with IS-GPS-200 compliant devices. Users who experience issues with their devices or receivers should contact the manufacturer to troubleshoot the problem.

    The U.S. Coast Guard Navigation Center provides information and services to civil GPS users. They can be contacted at 703-313-5900 or online.

  • TRAK Microwave offers 50-channel GPS reference clock

    TRAK Microwave has added a GPS time and frequency clock to its product offerings. The 50-channel 8835 GPS reference clock serves satcom, defense and wireless applications.

    The 8835 GPS clock has extreme power and interoperability options while maintaining GPS accuracy and reliability, TRAK Microwave said. While tracking GPS, the clock exhibits a frequency accuracy of <1 x 10-12 and a 1 PPS accuracy with <50 nanoseconds, RMS.

    8835 GPS Clock by TRAK Microwave.
    8835 GPS Clock by TRAK Microwave.

    The proprietary oscillator steering discipline algorithm can enhance the RMS accuracy of either the double oven crystal oscillator or optional enhanced rubidium oscillator for greater depths of accuracy.

    To increase interoperability, the 8835’s 10/100 base-T Ethernet interface can leverage a range of network protocols including NTP, SNMP, Telnet, SSH and FTP for status and control. The unit can also accept a variety of power sources including 24 VDC, 48 VDC or 100-240 VAC with an external AC/DC converter.

    The highly compact and configurable device operates from -30oC to +60oC with a TNC GPS receiver port. A datasheet on the 8835 can be downloaded here.

  • Connor-Winfield Offers GPS-Disciplined Clock

    Connor-Winfield Offers GPS-Disciplined Clock

    Connor-Winfield-FTS500-W
    The FTS500 Xenith TBR

    The FTS500 Xenith TBR (Time Base Reference) by Connor-Winfield is designed for DVB/DAB, wireless communications, time-stamping, or any other timing vital application.

    The Xenith TBR module is a GPS-driven, mixed-signal phase lock loop, providing a 1PPS CMOS output and generating a 10-MHz SINE output from an intrinsically low jitter voltage controlled crystal oscillator (VCXO). The 10-MHz output is disciplined from an on-board GPS receiver, which drives the long-term frequency stability. Its on-board CW25 timing GPS receiver along with a dual-oven system provides the highest quality timing and synchronization signals combined with superb hold-over characteristics. The unit is housed in a 106 x 125 x 56 millimeter strong aluminum enclosure.