GLONASS

GPS/GLONASS Dispute: CEO Clarifies Misunderstandings

May 23, 2014By
LD-Javad

“Use any opportunity to create friendship and peace,” urged Javad Ashjaee, president and CEO of JAVAD GNSS, in a May 23 conversation with journalists. He decried the recent controversy about monitoring stations on both U.S. and Russian soil, saying it was based in misinformation and misinterpretations, inflated by a political crisis in a completely different area. “This [GNSS] is a... read more

Russian Proton-M Crashes, Loses Another Payload

May 16, 2014By

In 2013, Russia lost three GLONASS satellites when their launch aboard a Proton-M rocket went awry, sending the satellites crashing into the Baikonur Cosmodrome in Kazakhstan instead of aloft into space. Before that, in 2010, three other GLONASS satellites ended up in the Pacific Ocean aboard a Proton-M rocket. This week, on  May 15, another Proton-M satellite crashed, this time with... read more

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The System: GLONASS Fumbles Forward

May 1, 2014By
GLONASS PLOT from the Roscosmos GLONASS Information-Analytical Centre, showing the 12-hour outage, with full service eventually restored on April 2.

Two April Disruptions Furnish Fodder for Multi-GNSS Receivers and Alternative PNT In an unprecedented total disruption of a fully operational GNSS constellation, all satellites in the Russian GLONASS broadcast corrupt information for 11 hours, from just past midnight until noon Russian time (UTC+4) on April 2 (or 5 p.m. on April 1 to 4  a.m. April 2, U.S. Eastern time).... read more

Faulty Software Determined Cause of GLONASS Failures

April 25, 2014By

The two April failures in Russia’s GLONASS were caused by mathematical mistakes in software, according to Oleg Ostapenko, head of the Russian space agency Roscosmos. Russian newspaper Ria Novosti reported on a press conference where Ostapenko said that programmers who had designed the satellites’ new software had made several mathematical mistakes, but the problem was not major and has practically... read more

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GLONASS Loses Control Again

April 16, 2014By
glonass_problem

The GLONASS constellation has suffered a major problem for the second time this month. On Monday, April 14, eight GLONASS satellites were simultaneously set unhealthy for about half an hour, meaning that most GLONASS or multi-constellation receivers would have ignored those satellites in positioning computations. In addition, one other satellite in the fleet was out of commission undergoing maintenance. This... read more

Locata Warns: Lessons to Be Learned from GLONASS Spasm

April 15, 2014By
Locata-O

Calling it an “unprecedented and deeply worrying total disruption . . . [that] shook the industry,” Locata Corporation reiterated its call for redundant terrestrial systems to back up GNSS in the wake of the April 1 11-hour GLONASS system outage. Nunzio Gambale, Locata CEO, said “We have been telling the industry for years that you cannot have a critically important... read more

GLONASS Transitions to New Geocentric Coordinate System

April 11, 2014By

The transition to using the terrestrial geocentric coordinate system “Parametry Zemli 1990” (PZ-90.11) in operating GLONASS has been implemented, according to an April 4 announcement by the Russian Federal Space Agency’s Information-Anayltical Center. The implementation fulfills Russian Government Resolution № 1463 of December 28, 2012, “On the Common National Geodetic Coordinate Systems,” outlining the transition starting at 3 p.m. on... read more

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GLONASS Failure Inconsequential to Users, Says Russian Press

April 8, 2014By

Reports in the semi-official Russian news daily Izvestia indicate that finger-pointing has gotten underway regarding the April 1 GLONASS systemic blackout, which followed two other high-profile disasters, the destruction-upon-launch of three new GLONASS satellites in July 2013, and the Pacific drowning of three other satellites in December 2010. While we have neither full nor fluent translations from the Russian, we... read more

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