Soyuz 2.1b • GLONASS 147

Soyuz 2.1b • GLONASS 147

A Roscosmos Soyuz rocket will launch the latest GLONASS-K navigation satellite, designated GLONASS-K1 №18L, into medium Earth orbit (MEO). The spacecraft is the 6th Uragan-K to be launched, and overall the 147th spacecraft of the GLONASS program. The rocket will fly in the Soyuz 2.1b configuration with a Fregat-M upper stage. - GLONASS-K (Uragan-K) spacecraft are the are the third generation of GLONASS navigation satellites. The Uragan-K1 satellites have an increased lifetime of 10–12 years, reduced weight of only 935kg and offer an additional L-Band navigational signal. The payload consists of L-Band navigation signals in 25 channels separated by 0.5625 MHz intervals in two frequency bands: 1602.5625 - 1615.5 MHz and 1240 - 1260 MHz. EIRP 25 to 27 dBW. Right hand circular polarized. On-board cesium clocks provide time accuracy to 1000 nanoseconds. A civil reference signal on L2 frequency is to be added after the completion of flight testing of Glonass-M in 2004 to substantially increase the accuracy of navigation relaying on civil signals. A third civil reference signal within the new frequency band of 1164-1215 MHz offered by the Glonass-K1 satellite to enable civil airlines to use satellite-aided positioning as the primary navigation facility. The new Uragan-K1 spacecraft also carries instrumentation of the KOSPAS-SARSAT international search-and-rescue system. GLONASS (Globalnaya Navigationnaya Sputnikovaya Sistema, Global Orbiting Navigation Satellite System) is a Russian space-based navigation system comparable to the American GPS system, which consists of Uragan spacecraft. The operational system contains 21 satellites in 3 orbital planes, with 3 on-orbit spares. GLONASS provides 100 meters accuracy with its C/A (deliberately degraded) signals and 10–20 meter accuracy with its P (military) signals.

📍 Pad 43/? - Plesetsk Cosmodrome

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