GLONASS

The System: GLONASS in April, What Went Wrong

June 24, 2014By
Figure 1. Affected broadcast messages for each GLONASS satellite. Colors indicate the different orbit planes.

By Gerhard Beutler, Rolf Dach, Urs Hugentobler, Oliver Montenbruck, Georg Weber, and Elmar Brockmann What Happened: On April 1, 2014, at 21:15 UTC, all GLONASS satellites started to transmit wrong Broadcast Messages (BM) as previously reported by GPS World. The satellite positions derived from these BM were wrong by up to ± 200 kilometers in each of the three coordinates... read more

Russia Launches Single GLONASS Satellite

June 16, 2014By
GLONASS-launch-O

A single GLONASS-M satellite was launched from the Plesetsk Cosmodrome on Saturday, June 14, at 17:16 UTC. The satellite, GLONASS-M 55 (with designation 755 once operational and also known as Kosmos 2500), was inserted into the GLONASS constellation’s Plane 3 and will occupy orbital slot 21, according to ISS Reshetnev, the manufacturer of the satellite. Reshetnev also reported that the... read more

This article is tagged with and posted in Featured Stories, GLONASS, GNSS News, Latest News

GLONASS-M Satellite to Launch June 14

June 9, 2014By
glonass_M-launch-O

GLONASS-M satellite number 55 is planned for launch on June 14 from the Plesetsk cosmodrome, said the first deputy director Viktor Kosenko as reported by Interfax.ru. Kosenko said that through 2020, 25 more GLONASS satellites are planned: 11 GLONASS-M, 10 Glonass-K1, and four Glonass-K2. At the same time, he said, one GLONASS-K1 spacecraft is in orbit undergoing flight tests. GLONASS-M... read more

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Russia Turns off Data from IGS GPS Tracking Stations

June 2, 2014By
Russia-IGSstations-O2

As announced by Russian Deputy Prime Minister Dmitry Rogozin on May 13, 2014, GPS tracking stations co-sponsored by U.S. interests have stopped making their data available to scientists and others. The tap on the flow of data from 11 stations was turned off starting on May 31. The data flow included hourly and daily data files from the stations as... read more

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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