From mujibur.inmind.com!uunet!in1.uu.net!news1.digital.com!ames!dont-send-mail-to-path-lines Fri Aug 4 13:35:02 1995 Path: mujibur.inmind.com!uunet!in1.uu.net!news1.digital.com!ames!dont-send-mail-to-path-lines From: lang@unb.ca (Richard Langley) Newsgroups: comp.infosystems.gis,rec.aviation.misc,rec.boats,rec.radio.amateur.space,sci.electronics,sci.engr.surveying,sci.geo.satellite-nav,sci.space.news Subject: Navstar GPS Constellation Status (95-08-04) Followup-To: sci.space.policy Date: 4 Aug 1995 09:40:39 -0700 Organization: UTexas Mail-to-News Gateway Lines: 85 Sender: daemon@news.arc.nasa.gov Approved: sci-space-news@ames.arc.nasa.gov Message-ID: NNTP-Posting-Host: news.arc.nasa.gov Xref: mujibur.inmind.com comp.infosystems.gis:814 rec.aviation.misc:2167 rec.boats:3925 rec.radio.amateur.space:266 sci.electronics:5291 sci.engr.surveying:259 sci.geo.satellite-nav:1379 sci.space.news:150 Navstar GPS Constellation Status (95-08-04) Blk NASA 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 A-1 84-09-08 Rb 84-10-03 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-3 89-08-18 Cs 89-10-14 20:21 UT II-4 19 19 1989-085A 20302 A-4 89-10-21 Rb 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 B-2 90-03-26 Rb 90-04-18 23:13 UT 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-2 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 C-2 92-04-10 Cs 92-04-25 20:32 UT II-14 26 26 1992-039A 22014 F-2 92-07-07 Cs 92-07-23 19:43 UT II-15 27 27 1992-058A 22108 A-3 92-09-09 Cs 92-09-30 20:08 UT II-16 32 01 1992-079A 22231 F-1 92-11-22 Rb 92-12-11 14:49 UT II-17 29 29 1992-089A 22275 F-4 92-12-18 Cs 93-01-05 16:39 UT II-18 22 22 1993-007A 22446 B-1 93-02-03 Cs 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 Cs 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 Cs 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 38 To be launched on need in FY '95 33 To be launched on need in FY '95 40 To be launched on need in FY '96 30 To be launched on need in FY '96 Notes ----- 1. NASA Catalog Number is also known as NORAD or U.S. Space Command object 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 and PRN28 appear 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. A-S was turned off on all satellites at 20:00 UT on 95-04-19 and back on on 95-05-10 and was off again between 95-06-19 and 95-07-10. A-S has been off on PRN28 since 95-02-21. 6. PRN number of SVN32 was changed from 32 to 01 on 93-01-28. 7. 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. 8. 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 the date GPSIC gives for "deactivation". =============================================================================== Richard B. Langley Internet: LANG@UNB.CA or SE@UNB.CA Geodetic Research Laboratory BITnet: LANG@UNB or SE@UNB Dept. of Geodesy and Geomatics Engineering Phone: (506) 453-5142 University of New Brunswick FAX: (506) 453-4943 Fredericton, N.B., Canada E3B 5A3 Telex: 014-46202 Fredericton? Where's that? See: http://degaulle.hil.unb.ca/NB/fredericton.html ===============================================================================