Navstar GPS Constellation Status
                                   (09-11-11)

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          89-02-14        89-04-15     00-04-14
II-2    13 02  1989-044A  20061          89-06-10        89-08-10     04-05-12
II-3    16 16  1989-064A  20185          89-08-18        89-10-14     00-10-13
II-4    19 19  1989-085A  20302          89-10-21        89-11-23     01-09-11
II-5    17 17  1989-097A  20361          89-12-11        90-01-06     05-02-22
II-6    18 18  1990-008A  20452          90-01-24        90-02-14     00-08-18
II-7    20 20  1990-025A  20533          90-03-26        90-04-18     96-05-10
II-8    21 21  1990-068A  20724          90-08-02        90-08-22     03-01-27
II-9    15 15  1990-088A  20830          90-10-01        90-10-15     07-03-14

Block IIA
II-10   23 32  1990-103A  20959    E-5   90-11-26   Rb2  90-12-10 23:45 UT
II-11   24 24  1991-047A  21552    D-5   91-07-04   Cs4  91-08-30 04:44 UT
II-12   25 25  1992-009A  21890    A-5   92-02-23   Rb1  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-5   92-07-07   Rb1  92-07-23 19:43 UT
II-15   27 27  1992-058A  22108    A-6   92-09-09   Cs4  92-09-30 20:08 UT
II-16   32 01  1992-079A  22231          92-11-22        92-12-11     08-03-17
II-17   29 29  1992-089A  22275          92-12-18        93-01-05     07-10-23
II-18   22 22  1993-007A  22446          93-02-03        93-04-04     03-08-06
II-19   31 31  1993-017A  22581          93-03-30        93-04-13     05-10-24
II-20   37 07  1993-032A  22657          93-05-13        93-06-12     07-12-20
II-21   39 09  1993-042A  22700    A-1   93-06-26   Cs4  93-07-20 12:54 UT
II-22   35 05  1993-054A  22779          93-08-30        93-09-28     09-03-26
II-23   34 04  1993-068A  22877    D-4   93-10-26   Rb1  93-11-22 18:20 UT
II-24   36 06  1994-016A  23027    C-5   94-03-10   Rb1  94-03-28 14:20 UT
II-25   33 03  1996-019A  23833    C-2   96-03-28   Cs4  96-04-09 21:17 UT
II-26   40 10  1996-041A  23953    E-6   96-07-16   Cs3  96-08-15 15:05 UT
II-27   30 30  1996-056A  24320    B-2   96-09-12   Cs3  96-10-01 15:28 UT
II-28   38 08  1997-067A  25030    A-3   97-11-06   Rb1  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-3   97-07-23   Rb1  98-01-31 00:57 UT
IIR-3   46 11  1999-055A  25933    D-2   99-10-07   Rb1  00-01-03 15:02 UT
IIR-4   51 20  2000-025A  26360    E-1   00-05-11   Rb1  00-06-01 16:09 UT
IIR-5   44 28  2000-040A  26407    B-3   00-07-16   Rb2  00-08-17 13:51 UT
IIR-6   41 14  2000-071A  26605    F-1   00-11-10   Rb1  00-12-10 21:12 UT
IIR-7   54 18  2001-004A  26690    E-4   01-01-30   Rb1  01-02-15 15:51 UT
IIR-8   56 16  2003-005A  27663    B-1   03-01-29   Rb3  03-02-18 15:53 UT
IIR-9   45 21  2003-010A  27704    D-3   03-03-31   Rb3  03-04-12 05:27 UT
IIR-10  47 22  2003-058A  28129    E-2   03-12-21   Rb3  04-01-12 16:50 UT
IIR-11  59 19  2004-009A  28190    C-3   04-03-20   Rb3  04-04-05 17:06 UT
IIR-12  60 23  2004-023A  28361    F-4   04-06-23   Rb2  04-07-09 16:07 UT
IIR-13  61 02  2004-045A  28474    D-1   04-11-06   Rb1  04-11-22 16:23 UT

Block IIR-M
IIR-M-1 53 17  2005-038A  28874    C-4   05-09-26   Rb3  05-12-16 23:30 UT
IIR-M-2 52 31  2006-042A  29486    A-2   06-09-25   Rb3  06-10-12 22:53 UT
IIR-M-3 58 12  2006-052A  29601    B-4   06-11-17   Rb3  06-12-13 03:07 UT
IIR-M-4 55 15  2007-047A  32260    F-2   07-10-17   Rb3  07-10-31 22:46 UT
IIR-M-5 57 29  2007-062A  32384    C-1   07-12-20   Rb3  08-01-02 20:41 UT
IIR-M-6 48 07  2008-012A  32711    A-4   08-03-15   Rb3  08-03-24 20:08 UT
IIR-M-7 49 01  2009-014A  34661    B-2   09-03-24   Rb2
IIR-M-8 50 05  2009-043A  35752    E-3   09-08-17   Rb1  09-08-27 14:40 UT


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 decommissioned from operational 
    service.
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.  S/A was set to 0 on all 
    satellites by presidential order on 2 May 2000 at approximately 04:00 UT.
5.  Anti-spoofing (A-S) was activated on 31 January 1994 at 00:00 UT on all 
    Block II satellites (ref. NANU 050-94042); occasionally off for test and 
    other purposes.
6.  Availability dates:
    These are the dates when a particular satellite is set healthy following
    launch. Typically these dates are days to weeks after the L-band
    transmitters first become active.
7.  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".
    See earlier Navstar GPS Constellation Status reports for information on 
    the decommissioning of inactive satellites. The PRN numbers of 
    decommissioned satellites are re-assigned to new satellites.
8.  PRN number of SVN32 was changed from 32 to 01 on 28 January 1993.
9.  Note that over the years, certain PRN codes have been reused by different
    satellites. In particular, several satellites have used PRN01 codes at
    different times, either operationally or for tests:
    SVN32 92-12-11 to 08-03-17 and 08-09-24 to 08-10-16
    SVN37 08-10-23 to 09-01-06
    SVN49 09-03-28 continues
10. PRN05/SVN35 and PRN06/SVN36 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. SVN35/PRN05 was decommissioned from active service on 26
    March 2009.
11. PRN01/SVN32, which had been decommissioned from active service on 17 March
    2008, resumed transmitting L-band signals, still as PRN01, on 24 September
    2008. The satellite was set unhealthy and not included in almanacs (ref.
    NANU 2008111). L-band transmissions were discontinued on 16 October 2008
    (ref. NANU 2008130). It remains a "reserve" satellite.
12. SVN37, which had been decommissioned from active service on 20 December    
    2007, resumed transmitting L-band signals as PRN01 on 23 October 2008 (ref. 
    NANU 2008131). The satellite stopped transmitting L-band signals on 6
    January 2009 (ref. NANU 2009001). The satellite was not set healthy during
    this period and was not included in almanacs. It remains a "reserve"
    satellite.
13. PRN05/SVN35 was set unusable on 26 March 2009 at 13:20 UT. It was
    decommissioned from active service on 26 March 2009 at 20:31 UT (ref. NANU
    2009023). L-band transmissions continued until 8 June 2009 (ref. IGS). It
    remains a "reserve" satellite.
14. PRN01/SVN49 was launched on 24 March 2009. L1/L2 transmissions began on 28
    March 2009. L5 transmissions began on 10 April 2009. The satellite remains
    set unhealthy until an L1/L2 satellite multipath issue is resolved. The
    satellite is currently colocated with PRN30/SVN30.
15. PRN05/SVN50 was launched on 17 August 2009. L1/L2 transmissions began on 21
    August 2009. The satellite was set healthy on 27 August 2009 at 14:40 UT
    (ref. NANUs 2009053 and 2009055).
16. PRN08/SVN38 active clock switched from Cs3 to Rb1 on 15 October 2009 (ref.
    NGA and NANU 2009103).
17. PRN10/SVN40, previously a prime satellite in orbital slot E-3 has undergone
    a delta-V to position it further away from PRN05/SVN50, which has taken 
    over the E-3 slot (ref. NGA and NANU 2009074).
18. PRN24/SVN24 was transitioned out of the broadcast almanac beginning on 12
    September 2009. However, there has been no official announcement that the
    satellite has been decommissioned and it is still transmitting valid L-band
    signals and ephemerides although set unhealthy (ref. NANU 2009065).
19. PRN25/SVN25 was set unusable and decommissioned from active service on 20
    August 2009 at 15:14 UT. The L-band transmitters kept operating and the
    satellite was returned to active service on 12 September 2009 at 22:12 UT
    as it had been established that the satellite would be a better one for
    active service than PRN24/SVN24 (ref. NANUs 2009054, 2009065, 2009067).
20. Constellation plot:
    <http://gge.unb.ca/Resources/GPSConstellationPlot.pdf>.
21. The next scheduled GPS satellite launch is (ref. Spaceflight Now):
    IIF-1                        NET May 2010
22. Compiled by Richard B. Langley, Dept. of Geodesy and Geomatics Engineering,
    University of New Brunswick.