GNSS

Launch of IRNSS-1D Postponed

March 4, 2015By

The launch of India’s fourth navigation satellite, IRNSS-1D, originally scheduled for March 9, has been postponed. During the integrated electrical checks on March 3 of the launch vehicle and satellite following closure of the heat shield, an anomaly was observed in one of the telemetry transmitters of the satellite, according to a post on the Indian Space Research Organization (ISRO)’s Facebook page.... read more

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BeiDou Numbering Presents Leap-Second Issue

March 3, 2015By
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During preparation of playback scenarios for the upcoming leap-second event taking place in June, engineers at Racelogic identified a potential pitfall for GNSS engineers. The difficulty arises from the fact that BeiDou uses a different “day number” for the date to apply the leap second, compared with GPS and Galileo. GPS and Galileo use 1-7 as week day numbers, and... read more

ISRO to Launch Fourth Navigation Satellite March 9

March 2, 2015By

The Indian Space Research Organization (ISRO) is expected to launch IRNSS-1D on March 9, reports The Times of India. IRNSS-1D is the fourth navigation satellite in the Indian Regional Navigational Satellite System, and will make the constellation operable. The launch is tentatively planned for March 9 around 6:35 p.m. However, final go for the launch will be given by the ISRO’s Launch Authorization Board,... read more

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The System: Leap-Second Confusion

March 1, 2015By

The United States Civil GPS Service Interface Committee (CGSIC) has issued a notice about a problem some receivers are having implementing the correct time. The U.S. Coast Guard Navigation Center has received reports of synchronization issues since the implementation of a leap second on Jan. 21. Users experiencing this problem should contact the receiver manufacturer for a firmware or software... read more

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Obstacles in the Orbit Path of GPS III

February 25, 2015By

A Lockheed Martin vice president has stated that the first GPS III satellite will likely launch in 2017, not 2016 as had been projected in the most recent update. The company is readying the first satellite for launch availability by the end of 2015, for launch as early as the end of this year, but Space News reports that Mark... read more

When in Rome…Check Galileo’s Performance

February 20, 2015By
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The Thales Alenia Space plant in the eastern suburbs of Rome is home to a facility that provides a troubleshooting platform for the Galileo ground network and an assessment of the performance of the satnav constellation. read more

Third, Fourth Galileo FOC Satellites Confirmed Fit for Soyuz Launch

February 17, 2015By
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The third and fourth Galileo Full Operational Capability (FOC) satellites are a confirmed “fit” for their Arianespace Soyuz launch March 27, having made initial contact with the mission’s dual-payload dispenser in French Guiana, according to Arianespace. The fit check was completed over a two-day period inside the Spaceport’s S1A payload preparation building. The two satellites were installed separately, with the... read more

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GATE Facility Recertified as Galileo Test Bed

February 11, 2015By

The German Galileo test and development infrastructure GATE has been recertified to serve as a Galileo open‐air test laboratory, for receiver integrity testing (RAIM) for safety‐of‐life (SoL) applications, and for Galileo SIS ICD conformance of signal characteristics and signal quality. The GATE facility, in Berchtesgaden, is operated by IFEN GmbH. Certification was conducted by TÜV SÜD, an international service corporation... read more