GPS Operational
NORAD ID: 28874
Int'l Code: 2005-038A
Perigee: 19,936.4 km
Apogee: 20,440.4 km
Inclination: 55.5 °
Period: 717.9 minutes
Semi major axis: 26559 km
Launch date: September 26, 2005
Source: United States (US)
PRN: 17
Comments: Navstar 57, also known as USA 183 and as GPS 2R-M1 (and as GPS 2R-14), was launched by a Delta 2 rocket from Cape Canaveral AFS at 03:37 UT on 26 September 2005. It has three more frequency channels (with two more military and one more civilian), and is more secure against jamming and radiation than the older models. It will be positioned in Slot 4 of Plane C, taking over the duties of the aging GPS 2A-20 (that was launched in May 1993). It is planned to replace all the older members of the 28-satellite fleet with the updated 2R-M versions in a few years. (The perigee will be raised from 266 km to about 20,000 km soon.)
Two Line Element Set (TLE):
1 28874U 05038A 14113.73855558 .00000036 00000-0 00000+0 0 552
2 28874 055.4868 088.8174 0094868 240.1703 285.2653 02.00574370 62822
Source: AFSPC
NASA's NSSDC Master Catalog entry for NAVSTAR 57 (USA 183)
