 |
Questions/comments about the content of these pages should be directed to: The World Warning Agency for Satellites, wwas@nssdca.gsfc.nasa.gov National Space Science Data Center, Mail Code 633 NASA Goddard Space Flight Center, Greenbelt, MD 20771 |
High precision (<20 cm) GPS constellation tracking data obtained from the network of about 80 dedicated global stations that are of interest to geodetic study may be obtained through the following services provided by the International Association of Geodesy (IGS)
FTP: igscb.jpl.nasa.gov [directory /igscb]
WWW: http://igscb.jpl.nasa.gov/
E-mail: igscb@cobra.jpl.nasa.gov
The standard format of the GPS information appeared in SPX-515. The following e-mail from Richard Langley may be more useful to the user community.
From: SMTP%"lang@unb.ca" 7-OCT-1996 12:10:52.26
To: SARDI
CC:
Subj: Navstar GPS Constellation Status (96-10-07)
Navstar GPS Constellation Status
(96-10-07)
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-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 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-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-5 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 Cs 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
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 Rb 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
Notes
-----
1. NORAD Catalog Number is also known as U.S. Space Command (USSPACECOM)
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; off again between 95-06-19 and 95-07-10; and between
95-10-10 and 95-10-31. 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. The active clock on PRN01 was switched from a Rb to a Cs between 96-08-16
and 96-08-22 (ref. USNO and NANUs 134-96229 and 141-96234).
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. 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".
10. PRN16 will be moved from the E-3 slot to the E-5 slot to make room for
PRN10. An orbit maneouvre was carried out on 96-08-19 (ref. NANUs
120-96204, 137-96232).
11. PRN20 hs been unusable since 15:18 UT on 96-05-10 and will not return to
service (ref. NANU 118-96204). Cause of failure: loss of 3-axis
stabilisation. PRN20 was moved out of the B-2 slot to make room for PRN30
(ref. NANU 162-96256).
12. PRN28 has been moved from the C-2 slot to the C-5 slot, about 40 degrees
away. This move, which was initiated on 96-03-06 by lowering the orbit of
PRN28 by about 6 km, made way for PRN03. PRN03 is a backup for PRN28 which
has some undisclosed equipment problem. PRN28 will remain on the air, with
some subsystems shut down to conserve power (ref. NANUs 045-96066, NANU
068-96100, and GPS World Newsletter). The move was completed on 96-08-23
(ref. NANUs 127-96236 and 144-96236).
13. PRN30 (SVN30) was launched on 96-09-12 at 08:49 UT. It achieved initial
usable status on 96-10-01 at 15:28 UT (ref. NANUs 162-96256 and 171-96275).
14. Announced date of next scheduled launch: 97-01-13 (first Block IIR
satellite).
15. Compiled by Richard B. Langley, Dept. of Geodesy and Geomatics Engineering,
University of New Brunswick.
===============================================================================
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
===============================================================================
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Questions/comments about the content of these pages should be directed to: The World Warning Agency for Satellites, wwas@nssdca.gsfc.nasa.gov National Space Science Data Center, Mail Code 633 NASA Goddard Space Flight Center, Greenbelt, MD 20771 |