GPS Operational
NORAD ID: 21552
Int'l Code: 1991-047A
Perigee: 20,921.2 km
Apogee: 21,052.4 km
Inclination: 54.3 °
Period: 750.6 minutes
Semi major axis: 27357 km
Launch date: July 4, 1991
Source: United States (US)
PRN: 24
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 21552U 91047A 13141.11178429 .00000109 00000-0 00000+0 0 9303
2 21552 054.3247 165.4518 0023978 049.4952 352.2030 01.91858833159763
Source: AFSPC
NASA's NSSDC Master Catalog entry for NAVSTAR 23 (USA 71)
