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While Global Position System, GPS, has been one of the most recognizable symbols of space applications around the world, much less known was the fact that Russia also attempted to build a parallel network of satellites designed to provide accurate navigation. As its American counterpart, the Russian satellite navigation system, known as GLONASS, was born at the height of the Cold War for primarily military purposes. The GLONASS network could be used to determine coordinates and the speed of an aircraft, a vessel or any other vehicle across the globe. GLONASS network A fully completed GLONASS system should contain 21 active and three spare satellites spread over three orbital planes at the altitude of 19,100 kilometers and inclination 64.8 degrees toward the Equator. The Proton rocket equipped with Block D or Breeze M upper stage is capable of delivering a trio of satellites into orbit, from which two satellites later maneuver themselves into final orbits. When completed, the GLONASS constellation is designed to provide 100 meters accuracy with its "standard precision" C/A signals, which are deliberately degraded, and 10-20 meter accuracy with its P "high-precision" signals, originally available exclusively to the military. At the end of 2004, the head of the Federal Space Agency, FKA, called the separation between military and civilian frequencies in the GLONASS system, "awkward" and promised to provide the access to the high-precision navigation data to all users. Spacecraft The Uragan spacecraft was developed by NPO PM in Zheleznogorsk and, until the beginning of the 1990s, the satellites were mass produced by PO Polyot in Omsk under supervision of NPO PM. However NPO PM later returned to the full development and manufacturing of the Uragan-M spacecraft "on site." The last Uragan spacecraft built by PO Polyot was launched in December 2005. The Uragan satellite features a three-axis stabilization system,
which points it in nadir during the operational flight. Two solar arrays
provide power supply. GLONASS-M The GLONASS-M version of the satellite featured improved antennas, extended lifetime and the introduction of a separate transmission frequency dedicated to civilian users. GLONASS-K The GLONASS-K version was based on a brand-new Ekspress-1000 platform developed by NPO PM, which featured lighter, standardized unpressurized bus. The version also featured a third L-band transmitter for civilian users. Thanks to its extended service life, the satellite promised to cut its cost in half. The satellite's payload would also deliver more precise navigation than its predecessors. In December 2006, the head of NPO PM Nikolai Tostoedov promised the first launch of the GLONASS-K spacecraft in 2009. Summary of various Uragan modifications:
*according to Roskosmos Deployment In 2004, Russian officials promised to have 18 operational spacecraft within the GLONASS network, which is the minimum needed for the practical use of the system, by 2007. The constellation was expected to be completed with 24 spacecraft by 2010. By the end of 2005, Russian official sources said 14 satellites were active in orbit, not counting three, that were launched on Dec. 25, 2005. On August 30, 2006, RIA Novosti news agency quoted Minister of Defense Sergei Ivanov promising a full deployment of a 24-satellite GLONASS constellation by 2010. Ivanov's statement preceded a meeting of the military commission on the matter, presided over by a Deputy Prime Minister. Ivanov characterized the network as a vital element of the nation's infrastructure. The meeting also considered mass production of hardware for the end users of the system and related legal issues. In 2007, the Russian federal budget expected to allocate 11,799.5 million rubles for the GLONASS system. It would be a two-fold increase comparing to the funding in 2006, Russian media said. During 2006, Russian officials said that in the following years, the launch rate of the satellites for the GLONASS network would increase from one to two per year, delivering six new satellites instead of three annually. Two launches, scheduled for 2007 promised to increase the number of operational satellites in the GLONASS constellation from 12 to 18, which could finally enable practical use of the system for navigation sometimes in 2008. However in reality, after the December 2007 launch, the status of the satellites within the GLONASS constellation had been as following:
Interaction with American GPS Russia discussed various issues related to the development and use of GLONASS in parallel with American GPS and European Galileo systems. According to the head of Federal Space Agency, Anatoly Perminov, in December 2004 Russia and the US discussed the ways of preventing the use of satellite navigation systems by terrorists. Participation in Europe's Galileo network Russia also was in talks with the European Space Agency on the possible cooperation on the Galileo navigation network. Details beyond the possibility of launching Galileo satellites onboard the Soyuz rockets were not specified. Cooperation with India During 2004, Russia discussed the possibility of launching Uragan satellites onboard Indian rockets, in exchange for this country's access to navigation data from GLONASS. Cooperation with China Number of contacts between Russian and Chinese space officials included discussions of the GLONASS network. On May 24, 2006, Chief of Staff of the Chinese Liberation Army Lyan Guanle visited ground control center of the GLONASS system, according to RIA Novosti. According to the Russian media, China considered the development of its own satellite navigation system, which could involve purchases of the Russian technology. Recent missions 2004 Dec. 26: Russia sent up a trio of satellites to upgrade nation's global positioning system. A Proton-K rocket with a Block DM (11S861) upper stage, carrying two Uragan and a follow-on Uragan-M satellites blasted off from Baikonur Cosmodrome at 16:54 Moscow Time. The launch had previously been scheduled for Dec. 25, 2004. 2005 Dec. 25: The Proton-K rocket with Block DM upper stage blasted off from Site 81 in Baikonur Cosmodrome on Dec. 25, 2005 at 08:07 Moscow Time, carrying a trio of spacecraft for Russia's global positioning system, GLONASS. The payload included a regular Uragan spacecraft and a pair of upgraded Uragan-M satellites. The launch brought the number of active Uragan satellites to 17, while a fully functional GLONASS network was designed to have 24 spacecraft. However two Uragan-M spacecraft from the latest mission did not enter operational service until August 2006. At the time, there were 15 satellites actively functioning in orbit. During September 2006, three out of eight satellites within the 3rd plane were temporarily deactivated, apparently in anticipation of the launch of three new satellites in December 2006 and required re-arrangement of the constellation. (As many as five satellites were apparently affected during 2006). 2006 Dec. 25: The Proton-K rocket with Block DM-2 upper stage blasted off from Baikonur Cosmodrome on Dec. 25, 2006, at 23:18 Moscow Time, carrying a trio of spacecraft for Russia's global positioning system, GLONASS. According to the official ITAR-TASS news agency, the spacecraft successfully reached orbit at 02:50 Moscow Time on December 26, 2006. Satellites were still expected to use their own propulsion systems to reach final operational orbits. 2007 Oct. 26: Less than two months after its failure, the Proton rocket returned to flight, successfully delivering a trio of satellites for the Russian global navigation system, GLONASS. The Proton-K rocket equipped with Block DM upper stage and carrying three Uragan-M (GLONASS-M No. 18, 19, 20) satellites lifted off from Pad 24 at Site 81 in Baikonur Cosmodrome on Oct. 26, 2007, at 11:35:24 Moscow Time. According to a representative of the Russian space agency, Roskosmos, the upper stage successfully delivered all three spacecraft to its nominal orbit with the altitude 19,100 kilometers above the Earth surface and the inclination 64.8 degrees toward the Equator. At 15:07 Moscow Time, satellites successfully separated from the Block DM upper stage. Ground control then conducted two communication sessions with the spacecraft at 15:15 and 15:40 Moscow Time. According to a statement of the satellite manufacturer, NPO PM, on March 27, 2007, this mission was expected in September 2007. 2007 Dec. 25: Russia launched a second trio of navigation satellites aimed to complete the national global positioning system. A Proton M rocket with Block DM-2 upper stage lifted off from Baikonur Cosmodrome on Dec. 25, 2007, at 22:32 Moscow Decree Time. It carried three Uragan-M satellites for Russia's GLONASS navigation network. The mission was designed to deliver satellites into a circular orbit with the altitude 19,137 kilometers above the Earth surface and the inclination 64.8 degrees toward the Equator. According to a press-release of the Khrunichev enterprise, the developer of the Proton rocket, issued shortly after the liftoff, the launch went nominally. The satellites were expected to separate from the upper stage on December 26, 2007 at 02:24 Moscow Time. A complete list of Uragan launches:
*Moscow Decree Time This page is maintained by Anatoly Zak; last update: December 29, 2007 |
Scale model of the Uragan satellite. Copyright © 2001 Anatoly Zak
The Uragan-K model promised to extend life span of individual satellites within GLONASS constellation to 12 or even 15 years. Click to enlarge. Copyright © 2005 Anatoly Zak
The Proton-K rocket with Block DM upper stage lifts off from Baikonur with a trio of Uragan satellites on Dec. 25, 2006 at 23:28 Moscow Time. Credit: Roskosmos
GLONASS-M (Uragan-M) satellite. Credit: NPO PM |
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