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 |