From: lang@unb.ca (Richard Langley)
Subject: Navstar GPS Constellation Status (92-12-28)
To: sci-space-news@uunet.UU.NET
Followup-To: sci.space
Organization: CS Dept, University of Texas at Austin
Date: Mon, 28 Dec 1992 15:25:07 GMT


                        Navstar GPS Constellation Status
                                   (92-12-28)

Blk                       NASA   Orbit   Launch
II        PRN Internat. Catalog  Plane    Date
Seq   SVN Code   ID      Number  Pos'n    (UT)   Clock  Available/Decommissioned
--------------------------------------------------------------------------------
Block I
       1   4  1978-020A  10684          78-02-22        78-03-29     85-07-17
       2   7  1978-047A  10893          78-05-13        78-07-14     81-07-16
       3   6  1978-093A  11054          78-10-06        78-11-13     92-05-18
       4   8  1978-112A  11141          78-12-10        79-01-08     89-10-14
       5   5  1980-011A  11690          80-02-09        80-02-27     83-11-28
       6   9  1980-032A  11783          80-04-26        80-05-16     91-03-06
       7                                81-12-18        Launch failure
       8  11  1983-072A  14189    C-3   83-07-14   Rb   83-08-10
       9  13  1984-059A  15039    C-1   84-06-13   Cs   84-07-19
      10  12  1984-097A  15271    A-1   84-09-08   Rb   84-10-03
      11   3  1985-093A  16129    C-4   85-10-09   Rb   85-10-30

Block II
II-1  14  14  1989-013A  19802    E-1   89-02-14   Cs   89-04-15
II-2  13   2  1989-044A  20061    B-3   89-06-10   Cs   89-08-10
II-3  16  16  1989-064A  20185    E-3   89-08-18   Cs   89-10-14
II-4  19  19  1989-085A  20302    A-4   89-10-21   Cs   89-11-23
II-5  17  17  1989-097A  20361    D-3   89-12-11   Cs   90-01-06
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   Cs   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   Cs   91-08-30 04:44 UT
II-12 25  25  1992-009A  21890    A-2   92-02-23   Rb   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  32  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        expected 93-01-08

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.  PRN 3 is operating on Rb clock without temperature control.
5.  PRN 12 clock switched from Cs to Rb on 6 February 1992.
6.  PRN 11 clock switched from Cs to Rb on 4 April 1992.
7.  PRN 11 clock switch to last rubidium during 7 days beginning 29 September
    1992.
8.  PRN 14 suffered failure of its operational Cs clock on 29 August 1992.
    Satellite operating on second Cs clock by 1 September 1992.
9.  The power supplies of PRN 11 and 13 have insufficient capacity to maintain
    L1/L2 transmissions during eclipse season.  During this period, the L1/L2
    transmissions of PRN 11 and 13 may be turned off for up to 12 hours a day.

==============================================================================
 Richard B. Langley                        Internet: LANG@UNB.CA or SE@UNB.CA
 Geodetic Research Laboratory              BITnet:   LANG@UNB or SE@UNB
 Dept. of Surveying Engineering            Phone:    (506) 453-5142
 University of New Brunswick               FAX:      (506) 453-4943
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