Slot	Satellite	Space Vehicle No.	Launched
A1	GPS 2A-21	SV No. 14	June 26, 1993
A2	GPS 2A-12	SV No. 25	Feb. 23, 1992
A3	GPS 2A-22	SV No. 38	Nov. 6, 1997
A4	GPS 2A-15	SV No. 27	Sept. 9, 1992
A5*	GPS 2-4	SV No. 19	Oct. 19, 1989
B1	GPS 2A-18	SV No. 22	Feb. 3, 1993
B2	GPS 2A-27	SV No. 30	Sept. 12, 1996
B3	GPS 2-2	SV No. 13	June 10, 1989
B4	GPS 2A-22	SV No. 35	Aug. 30, 1993
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	VACANT
E2	GPS 2-8	SV No. 21	Aug. 2, 1990
E3	GPS 2A-26	SV No. 40	July 16, 1996
E4	GPS 2A-10	SV No. 23	Nov. 26, 1990
E5*	GPS 2-3	SV No. 16	Aug. 18, 1989
F1	GPS 2A-17	SV No. 29	Dec. 18, 1992
F2	GPS 2A-14	SV No. 26	July 7, 1992
F3	GPS 2-6	SV No. 18	Jan. 24, 1990
F4	GPS 2A-16	SV No. 32	Nov. 22, 1992
F5*	GPS 2R-2	SV No. 43	July 23, 1997
* Additional slot beyond the four primary ones in the plane. Notes: Satellites GPS 2-1, 2-7 and 2A-13 have reached the end of the useful lives. A launch failure destroyed 2R-1. Source: U.S. Department of Defense