GPS Operational
NORAD ID: 20830
Int'l Code: 1990-088A
Perigee: 21,335.3 km
Apogee: 21,432.8 km
Inclination: 54.0 °
Period: 767.0 minutes
Semi major axis: 27755 km
Launch date: October 1, 1990
Source: United States (US)
PRN:
Comments: Global Positioning System (GPS) was developed by the US Department of Defense to provide all-weather round-the-clock navigation capabilities for military ground, sea, and air forces. Since its implementation, GPS has also become an integral asset in numerous civilian applications and industries around the globe, including recreational used (e.g., boating, aircraft, hiking), corporate vehicle fleet tracking, and surveying. GPS employs 24 spacecraft in 20,200 km circular orbits inclined at 55 degrees. These vehicles are placed in 6 orbit planes with four operational satellites in each plane.
Two Line Element Set (TLE):
1 20830U 90088A 13139.17443030 .00000080 00000-0 00000+0 0 7497
2 20830 053.9618 176.2924 0017549 192.2694 253.2441 01.87754383163172
Source: AFSPC
NASA's NSSDC Master Catalog entry for NAVSTAR 21 (USA 64)
