Current GPS constellation
SPACEFLIGHT NOW
Posted: January 26, 2003

Slot Satellite Space Vehicle No. Launched
A1 GPS 2A-21 SV No. 39 June 26, 1993
A2 GPS 2A-12 SV No. 25 Feb. 23, 1992
A3 GPS 2A-28 SV No. 38 Nov. 6, 1997
A4 GPS 2A-15 SV No. 27 Sept. 9, 1992
B1 GPS 2A-18 SV No. 22 Feb. 3, 1993
B2 GPS 2A-27 SV No. 30 Sept. 12, 1996
B3 GPS 2R-5 SV No. 44 July 16, 2000
B4 GPS 2A-22 SV No. 35 Aug. 30, 1993
B5* GPS 2-2 SV No. 13 June 10, 1989
C1 GPS 2A-24 SV No. 36 March 10, 1994
C2 GPS 2A-25 SV No. 33 March 28, 1996
C3 GPS 2A-19 SV No. 31 March 30, 1993
C4 GPS 2A-20 SV No. 37 May 13, 1993
D1 GPS 2A-11 SV No. 24 July 4, 1991
D2 GPS 2R-3 SV No. 46 Oct. 7, 1999
D3 GPS 2-5 SV No. 17 Dec. 11, 1989
D4 GPS 2A-23 SV No. 34 Oct. 26, 1993
D5* GPS 2-9 SV No. 15 Oct. 1, 1990
E1 GPS 2R-4 SV No. 51 May 11, 2000
E2 Vacant
E3 GPS 2A-26 SV No. 40 July 16, 1996
E4 GPS 2R-7 SV No. 54 Jan. 30, 2001
E5* GPS 2A-10 SV No. 23 Nov. 26, 1990
F1 GPS 2R-6 SV No. 41 Nov. 10, 2000
F2 GPS 2A-14 SV No. 26 July 7, 1992
F3 GPS 2R-2 SV No. 43 July 23, 1997
F4 GPS 2A-16 SV No. 32 Nov. 22, 1992
F5* GPS 2A-17 SV No. 29 Dec. 18, 1992
* Additional slot beyond the four primary ones in the plane.

Notes: Satellites GPS 2-1, 2-3, 2-4, 2-6, 2-7, 2-8 and 2A-13 have reached the end of the useful lives and been retired. A launch failure destroyed 2R-1.

Source: U.S. Department of Defense

Pre-launch briefing
Launch timeline - Chart with times and descriptions of events to occur during the launch.

Global Positioning System - Description of the U.S. Air Force's space-based navigation network.

XSS-10 - The experimental microsatellite flying as a secondary payload on this launch.

Delta 2 rocket - Overview of the Delta 2 7925-model rocket used to launch GPS satellites.

SLC-17 - The launch complex where Delta rockets fly from Cape Canaveral.

Delta directory - See our coverage of preview Delta rocket flights.
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