From: SMTP%"lang@unb.ca" 26-MAR-2001 08:40:38.28 Subj: Navstar GPS Constellation Status (01-03-24) Navstar GPS Constellation Status (01-03-24) Blk NORAD Orbit Launch II PRN Internat. Catalog Plane Date Seq SVN Code ID Number Pos'n (UT) Clock Available/Decommissioned ------------------------------------------------------------------------------- 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-3 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 A-5 89-10-21 Cs 89-11-23 03:13 UT II-5 17 17 1989-097A 20361 D-3 89-12-11 Cs 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 Cs 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 Cs 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 Cs 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-5 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 ----- 1. NORAD Catalog Number is also known as U.S. Space Command (USSPACECOM) object. 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. PRN15/SVN15 was taken off of the air on 30 January 2001 at 02:11 UT because of large broadcast ranging errors caused by glint firings on the satellite. Glint firings are satellite thruster firings caused by the satellite seeing the Sun glint off the Earth during eclipse season for the satellite. The current estimated time of return to operations is 6 April 2001 when the satellite will no longer be in eclipse season (ref. DoD GPS Support Center and NANU 2001015). 10. PRN19/SVN19 was set unusable on 16 March 2001 at 02:16 UT due to on-going performance concerns (ref. DoD GPS SUpport Center and NANU 2001044). 11. PRN23/SVN23 is being moved from slot E-4 to E-5. 12. PRN29/SVN29 is drifting from slot F-1 to F-5. 13. PRN14/SVN41 was launched on 10 November 2000 at 17:14 UT. It resides in slot F-1, replacing PRN29. It became operational on 10 December 2000 at 21:12 UT (ref. NANU 2000202). 14. PRN18/SVN54 was launched on 30 January 2001 at 07:55 UT. It resides in slot E-4, replacing PRN23. It became operational on 15 February 2001 at 15:51 UT (ref. NANU 2001027). 15. The satellites in planes A and F have been re-phased recently. This version of the constellation status table indicates the re-phased slot locations. 16. Compiled by Richard B. Langley, Dept. of Geodesy and Geomatics Engineering, University of New Brunswick. =============================================================================== Richard B. Langley E-mail: lang@unb.ca Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 University of New Brunswick Fax: +1 506 453-4943 Fredericton, N.B., Canada E3B 5A3