LANG@UNB.CA (10/24/90)
Navstar GPS Constellation Status
(90-10-23)
Blk NASA Orbit
II PRN Internat. Catalog Plane Launch
Seq SVN Code ID Number Pos'n Date Clock Comment
--------------------------------------------------------------------------------
Block I
1 4 1978-020A 10684 (C-4) 78-02-22 Not usable since 85-07
2 7 1978-047A 10893 (A-4) 78-05-13 Not usable since 85-09
3 6 1978-093A 11054 A-3 78-10-06 Rb
4 8 1978-112A 11141 (C-3) 78-12-10 L-band signals turned
off 89-10-14
5 5 1980-011A 11690 (C-1) 80-02-09 Not usable since 84-05
6 9 1980-032A 11783 A-2 80-04-26 Rb Operating on 2nd Rb clock
7 81-12-18 Launch failure
8 11 1983-072A 14189 C-2 83-07-14 Cs
9 13 1984-059A 15039 C-1 84-06-13 Cs
10 12 1984-097A 15271 A-1 84-09-08 Cs
11 3 1985-093A 16129 D-1 85-10-09 Rb Actually near position
C-9; operating on Rb
clock without temp.
control
Block II
II-1 14 14 1989-013A 19802 E-1 89-02-14 Cs Became available 89-04-15
II-2 13 2 1989-044A 20061 B-3 89-06-10 Cs Became available 89-08-10
II-3 16 16 1989-064A 20185 E-3 89-08-18 Rb Became available 89-10-14
II-4 19 19 1989-085A 20302 A-4 89-10-21 Cs Became available 89-11-23
II-5 17 17 1989-097A 20361 D-3 89-12-11 Cs L-band signals enabled
90-01-06
II-6 18 18 1990-008A 20452 F-3 90-01-24 Cs Became available 90-02-14
22:26 UT
II-7 20 20 1990-025A 20533 B-2 90-03-26 Cs Became available 90-04-18
23:13 UT
II-8 21 21 1990-068A 20724 E-2 90-08-02 Cs Became available 90-08-22
15:00 UT
II-9 15 15 1990-088A 20830 D-2 90-10-01 Cs Became usable 90-10-15
00:39 UT
Notes
1. NASA Catalog Number is also known as NORAD or U.S. Space Command object
number.
2. Bracketed orbital plane position = satellite no longer operational.
3. An earlier version of this table had PRN 16 in plane D. Note correction.
4. Clock: Rb = Rubidium; Cs = Cesium
5. A series of maneouvres to rephase the Block I and II satellites began on 15
March 1990. PRNs 2, 11, 14, 18, and 19 are still drifting to their
final in-plane locations.
6. The orbit plane slots given for the Block I satellites are those positions
before the current maneouvres.
================================================================================
Richard B. Langley BITnet: LANG@UNB.CA or SE@UNB.CA
Geodetic Research Laboratory Phone: (506) 453-5142
Dept. of Surveying Engineering Telex: 014-46202
University of New Brunswick FAX: (506) 453-4943
Fredericton, N.B., Canada E3B 5A3
================================================================================Mills@udel.edu (10/24/90)
Richard, Space Command, hey? Last I boogied with the Spacetrack boys at Cheyenne Mountain they lost our recently launched AMSAT OSCAR 7 satellite put up by the radio hams circa 1974. Seems they assigned a catalog number that really belonged to the booster. We had a tough time convincing them of the error, which we quickly found by watching the acquisition times of the satellite beacon. I used to run the OSCAR HF communication network, which is how I came by that story first hand. I say this only to cast some doubt that all the NASA catalog numbers are correct. Heck the Russians generate at least tem times the catalog numbers than we do. Dave