Navstar GPS Constellation Status
(02-07-12)
Blk NORAD Orbit Launch
II PRN Internat. Catalog Plane Date
Seq SVN Code ID Number Pos'n (UT) Clock Available/Decommissioned
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Block I
01 04 1978-020A 10684 78-02-22 78-03-29 85-07-17
02 07 1978-047A 10893 78-05-13 78-07-14 81-07-16
03 06 1978-093A 11054 78-10-06 78-11-13 92-05-18
04 08 1978-112A 11141 78-12-10 79-01-08 89-10-14
05 05 1980-011A 11690 80-02-09 80-02-27 83-11-28
06 09 1980-032A 11783 80-04-26 80-05-16 91-03-06
07 81-12-18 Launch failure
08 11 1983-072A 14189 83-07-14 83-08-10 93-05-04
09 13 1984-059A 15039 84-06-13 84-07-19 94-06-20
10 12 1984-097A 15271 84-09-08 84-10-03 95-11-18
11 03 1985-093A 16129 85-10-09 85-10-30 94-04-13
Block II
II-1 14 14 1989-013A 19802 89-02-14 89-04-15 00-04-14
II-2 13 02 1989-044A 20061 B-5 89-06-10 Cs 89-08-10 20:46 UT
II-3 16 16 1989-064A 20185 89-08-18 89-10-14 00-10-13
II-4 19 19 1989-085A 20302 89-10-21 89-11-23 01-09-11
II-5 17 17 1989-097A 20361 D-3 89-12-11 Rb 90-01-06 03:30 UT
II-6 18 18 1990-008A 20452 90-01-24 90-02-14 00-08-18
II-7 20 20 1990-025A 20533 90-03-26 90-04-18 96-05-10
II-8 21 21 1990-068A 20724 E-2 90-08-02 Cs 90-08-22 15:00 UT
II-9 15 15 1990-088A 20830 D-5 90-10-01 Cs 90-10-15 00:39 UT
Block IIA
II-10 23 23 1990-103A 20959 E-5 90-11-26 Cs 90-12-10 23:45 UT
II-11 24 24 1991-047A 21552 D-1 91-07-04 Cs 91-08-30 04:44 UT
II-12 25 25 1992-009A 21890 A-2 92-02-23 Cs 92-03-24 11:00 UT
II-13 28 28 1992-019A 21930 92-04-10 92-04-25 97-05
II-14 26 26 1992-039A 22014 F-2 92-07-07 Rb 92-07-23 19:43 UT
II-15 27 27 1992-058A 22108 A-4 92-09-09 Rb 92-09-30 20:08 UT
II-16 32 01 1992-079A 22231 F-4 92-11-22 Cs 92-12-11 14:49 UT
II-17 29 29 1992-089A 22275 F-5 92-12-18 Rb 93-01-05 16:39 UT
II-18 22 22 1993-007A 22446 B-1 93-02-03 Rb 93-04-04 05:20 UT
II-19 31 31 1993-017A 22581 C-3 93-03-30 Rb 93-04-13 20:53 UT
II-20 37 07 1993-032A 22657 C-4 93-05-13 Rb 93-06-12 16:15 UT
II-21 39 09 1993-042A 22700 A-1 93-06-26 Cs 93-07-20 12:54 UT
II-22 35 05 1993-054A 22779 B-4 93-08-30 Cs 93-09-28 19:29 UT
II-23 34 04 1993-068A 22877 D-4 93-10-26 Rb 93-11-22 18:20 UT
II-24 36 06 1994-016A 23027 C-1 94-03-10 Cs 94-03-28 14:20 UT
II-25 33 03 1996-019A 23833 C-2 96-03-28 Cs 96-04-09 21:17 UT
II-26 40 10 1996-041A 23953 E-3 96-07-16 Cs 96-08-15 15:05 UT
II-27 30 30 1996-056A 24320 B-2 96-09-12 Rb 96-10-01 15:28 UT
II-28 38 08 1997-067A 25030 A-3 97-11-06 Rb 97-12-18 15:24 UT
Block IIR
IIR-1 42 12 97-01-17 Launch failure
IIR-2 43 13 1997-035A 24876 F-3 97-07-23 Rb 98-01-31 00:57 UT
IIR-3 46 11 1999-055A 25933 D-2 99-10-07 Rb 00-01-03 15:02 UT
IIR-4 51 20 2000-025A 26360 E-1 00-05-11 Rb 00-06-01 16:09 UT
IIR-5 44 28 2000-040A 26407 B-3 00-07-16 Rb 00-08-17 13:51 UT
IIR-6 41 14 2000-071A 26605 F-1 00-11-10 Rb 00-12-10 21:12 UT
IIR-7 54 18 2001-004A 26690 E-4 01-01-30 Rb 01-02-15 15:51 UT
Notes
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1. NORAD Catalog Number is also known as U.S. Space Command (USSPACECOM)
object number and NASA catalog number.
2. No orbital plane position = satellite no longer operational.
3. Clock: Rb = Rubidium; Cs = Cesium.
4. Selective Availability (S/A) had been enabled on Block II satellites during
part of 1990; S/A off between about 10 August 1990 and 1 July 1991 due to
Gulf crisis; standard level re-implemented on 15 November 1991;
occasionally off for test and other purposes. S/A was set to 0 on all
satellites by presidential order on 2 May 2000 at approximately 04:00 UT.
5. Anti-spoofing (A-S) was activated on 31 January 1994 at 00:00 UT on all
Block II satellites (ref. NANU 050-94042); occasionally off for test and
other purposes.
6. Decommissioning dates:
The decommissioning date for PRN06/SVN03 is the date of termination of
operations of this satellite (ref. USNO) and is about 3 weeks later than
other published dates for "deactivation".
See earlier Navstar GPS Constellation Status reports for information on
the decommissioning of inactive satellites.
7. PRN number of SVN32 was changed from 32 to 01 on 28 January 1993.
8. PRN05 and PRN06 are equipped with corner-cube reflectors for satellite
laser ranging (SLR). SLR tracking of the satellites will permit onboard
clock errors and satellite ephemeris errors in GPS tracking to be
differentiated.
9. PRN2/SVN13 has been moved, changing its orbital slot from B-3 to B-5
(ref. NANU 2002056, USCG NavCen).
10. The active clock on PRN27/SVN27 was switched from Cs3 to Rb2 on 10 June
2002 (ref. NANU 2002101, USNO, and NIMA).
11. PRN28/SVN44's slot designation has changed from B-5 to B-3 as a result of
the PRN2/SVN13 move.
12. PRN29/SVN29 continues to drift within the F-plane to a new F-5 slot
position.
13. The active clock on PRN31/SVN31 was switched from Cs3 to Rb1 on 15 April
2002 (ref. NANU 2002061, USNO, and NIMA).
14. The next satellite to join the constellation is IIR-8, currently scheduled
for launch in September 2002.
15. Compiled by Richard B. Langley, Dept. of Geodesy and Geomatics Engineering,
University of New Brunswick.
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