GPS World - February 2008 - (Page 14)

THE SYSTEM “Currently the number of satellites in orbit does not allow the full coverage of the Russian territory. System accuracy is not up to international standards. These standards are well-known: the standards of GPS.” Ivanov called for the Roscomos space agency’s leaders to take “personal responsibility for the development of particular components of GLONASS and the system as a whole,” reprimanding them for the system’s operational shortcomings. According to reports, GLONASS position accuracy varies between tens of meters, compared to GPS’s on the order of one meter. Ivanov said production output at plants manufacturing the satellites is still inadequate. “Devices on the satellites have not yet reached the necessary reliability level. Unfortunately, competitive domestic navigation equipment is still not available on the Russian market,” he said. (See story in this issue’s Business section on a GLONASS/GPS receiver for sale in Russia.) New Pad. Ivanov wants future GLONASS launches to take place, not from Kazakhstan, but on Russian soil from 2016. “We now also have to concentrate on erecting a new cosmodrome, Vostochny, in Russia’s far east. We’ll practically have to build a new city.” Russia holds a leadership position in commercial space launches currently, leasing booster space aboard its rockets to other nations and ventures. A launch facility under its own control could strengthen that position. A fully operational GLONASS will optimistically comprise 24 GLONASS-M and GLONASS-K satellites by 2010, with 21 transmitting signals and three on-orbit spares. The first two improved GLONASS-K satellites are set for 2009 launches. GLONASS-K, proffers an entirely new model based on a non-pressurized platform. No official word has surfaced yet on the conclusion of negotiations to add a CDMA signal to the new satellites, to make GLONASS at least partially interoperable with GPS and Galileo. Rising oil revenues have fueled a resurgence in the sat nav system; Russia allocated 9.88 billion rubles ($380 million) for GLONASS in 2007, up from 4.7 billion ($181 million) in 2006. Boosting three satellites per rocket launch affords the capability of increasing constellation numbers by leaps and bounds. However, the satellites’ short design lifespan of three years also means that numbers can fall rapidly. Record Set by GPS GPS IIR-18 (M), launched from Cape Canaveral on December 20, has logged a record-setting go-time under a joint U.S. Air Force/Lockheed Martin team, who conducted the on-orbit deployment and checkout of all spacecraft systems in just over three days. Upon completion of navigation payload initialization, the satellite was declared operational on January 2 for both civil and military users. The satellite, dubbed SVN57, joins a constellation comprising 31 operational satellites overall. GPS IIR-18 (M) will replace SVN36, which in turn will replace SVN37 and be placed in orbital slot C1. Packages 5.0 x 7.0 5.0 x 3.2 3.2 x 2.5 Stability 0.10 ppm 0.25 ppm 0.5 ppm 1.0 ppm Industrial Temp -40º to +85º C Applications GSM CDMA Base Station Stratum 3 WiMax IEEE1588 Femtocell NTP/PTP GPS NOAA Point on Global Monitoring The U.S. National Oceanic and Atmospheric Administration will lead an international effort to pinpoint locations of more than 40 global positioning satellites in Earth orbit, to ensure the accuracy of GPS data. NOAA personnel will compile and analyze satellite orbit data from 10 analysis centers worldwide to ensure the accuracy of GPS information. For the next four years, NOAA’s National Geodetic Survey will serve as the Analysis Center Coordinator for the International Global Navigation Satellite Systems Service, a voluntary federation of more than 200 organizations that provide continuous global satellite-tracking data. www.gpsworld.com For over 40 years Connor-Win eld has been the leader in oscillator design and manufacturing for the telecommunications industry. ISO 9001:2000 Certiﬁed osc.conwin.com European Headquarters: +353-61-472221 Global Timing Solutions 14 GPS World | February 2008 http://osc.conwin.com http://www.gpsworld.com

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GPS World - February 2008 Contents Out in Front Expert Advice Galileo's Second Coming Soon UPS First to Use ADS-B European Industry Group Galileo Validation 2008 Antenna Survey Tsumani Detection by GPS Classifieds Advertisers Index Seen + Heard

GPS World - February 2008

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