GPSr> GNSS Galileo Beidou - Compass SYSTEM 1st Launch Date Active Orbit Distance Orbit Angle # of Satellite Frequency Polarization Modulation & Coding Clock Error documentation GNSS Globalnaya navigatsionnaya sputnikovaya sistema Oct 12, 1982 1995 Nov 2011 19,100km 25,440km 64.8° 30 FDMA 1,602+k*9/16MHz 1246+k*7/16MHz CDMA 1202.025MHz RHCP BPSK Code_division multiple access frequency_division multiple access method 5x10^-14 http://www.glonass-ianc.rsa.ru/en/index.php GPS Global Positioning System 1989 1994 20,200km 55° 24 1,575.42MHz 1.17645GHZ-L5 P(Y) 1,227.60MHz RHCP bi-Phase Shift Keying Code division multiple access http://www.gps.gov/ Galileo ESA Nov 4, 2011 ? 23,222km 56° 3 1559-1592MHz 1164-1215MHz 1260-1300MHz Right Hand Circular Pol. code division multiple access quadrature phase shift keying & binary phase shift keying http://www.gpsworld.com/gnss-system/galileo/galileo-frequency-signal-design-810?page_id=2 Beidou - Compass China Apr 13, 2007 ? 21,150km 55.5° 10 35 total 1561MHz 1268.52 MHz 1207.14MHz BPSK http://waas.stanford.edu/CompassCode/COMPASS_E2.html http://www.positim.com/navsys_overview.html http://en.wikipedia.org/wiki/CDMA http://www.insidegnss.com/ http://ibank.tripod.com/lecture/GPS90.HTM http://www.gpsworld.com/gnss-system/news/german-space-agency-records-spectrum-new-glonass-l3-signal-11547 http://lea.hamradio.si/~s53mv/navsats/theory.html http://lea.hamradio.si/~s53mv/navsats/analog.html

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File updated on December 02 2011 08:43:14.

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