From: SMTP%"lang@unb.ca" 11-NOV-1999 11:19:48.33 To: SARDI CC: Subj: Navstar GPS Constellation Status (99-11-11) X-Authentication-Warning: sol.sun.csd.unb.ca: lang owned process doing -bs Date: Thu, 11 Nov 1999 12:19:13 -0400 (AST) From: Richard Langley X-Sender: lang@sol.sun.csd.unb.ca To: "Richard B. Langley" Subject: Navstar GPS Constellation Status (99-11-11) Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Navstar GPS Constellation Status (99-11-11) 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 E-1 89-02-14 Cs 89-04-15 05:02 UT 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 E-5 89-08-18 Cs 89-10-14 20:21 UT 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 F-3 90-01-24 Cs 90-02-14 22:26 UT 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-4 90-11-26 Cs 90-12-10 23:45 UT II-11 24 24 1991-047A 21552 D-1 91-07-04 Rb 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-1 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-5 97-07-23 Rb 98-01-31 00:57 UT IIR-3 46 11 1999-055A 25933 D-2 99-10-07 Rb Notes ----- 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. Currently, PRN15 appears to have little or no S/A imposed. 5. Anti-spoofing (A-S) was activated on 94-01-31 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". PRN20 had been unusable since 10 May 1996 according to NANU 118-96204 although it was set usable between 07:36 UT on 20 May 1996 and 22:42 UT on 21 May 1996 (ref. NANUs 094-96141 and 095-96142). Disposed of on 13 December 1996 (ref. USNO). PRN28 was last usable on 4 November 1996 at 16:34 UT (ref. NANU 179-96309). It was declared inoperable in May 1997. It was removed from the broadcast almanacs of all satellites on 15 August 1997. See Navstar GPS Constellation Status report of 6 November 1997 for more information. 7. PRN number of SVN32 was changed from 32 to 01 on 93-01-28. 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. PRN07's active clock was switched from a cesium to a rubidium on 20 April 1999 (ref. NANUs 1999044, 1999050, and USNO). 10. PRN11 (SVN46) was launched on 7 October 1999. It will reside in slot D-2, previously occupied by PRN15 which is being moved to slot D-5. PRN11 is expected to be available within about a month of launch. 11. PRN19's active clock was switched from a rubidium to a cesium on 23 September 1999 (ref. NANUs 1999161, 1999166, and USCG). 12. It appears that the satellites in planes A and F are being re-phased. The mean motion of PRN01 was reduced from about 2.0055 to 2.0049 orbits per day on or about 3 February 1999 and the mean motion of PRN08 was increased from about 2.0056 to 2.0080 orbits per day on or about 1 October 1999. This version of the constellation status table indicates the re-phased slot locations. 13. 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 ===========================================================================