GNSS

Galileo Satellites Ready for Fueling as Launcher Takes Shape

March 9, 2015By
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By the European Space Agency All the elements for this month’s Galileo launch are coming together at Europe’s Spaceport in French Guiana. As the two satellites undergo final testing and preparations, the first part of their Soyuz launcher has also been integrated. Assembly of the Soyuz ST-B’s first two stages, plus its four first stage boosters, took place at the... read more

Arianespace Soyuz Begins Integration for March 27 Galileo Launch

March 5, 2015By

The Soyuz launcher for Arianespace’s upcoming mission with two European Galileo navigation satellites is taking shape at the Spaceport for a March 27 liftoff from French Guiana. “During activity in the Spaceport’s Soyuz Launcher Integration Building, the medium-lift workhorse began to assume its iconic form with integration of the four first-stage strap-on boosters to the Block A core second stage,” Arianespace wrote in an... read more

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