Friday, June 8, 2007

DSCS-2 F3/4

  1973-100A/B


Satellite 9433 (F-3) was launched on 1973 Dec 13 together with F-4. Its prelaunch designation was DSCS II B-3; the B reflected a system upgrade. It suffered a temporary attitude failure in 1975 but was still operating in 1976. It was retired in the late 1970s and moved out of stationary orbit in 1982. 


DSCS II B-3 
 

DateTimeEventOrbit  

1973 Dec 13  2357:01  Launch by Titan 3C  CC LC40 
  T+1:49 Stage 1 ignition 
  T+2:02 SRM sep 
1973 Dec 14   T+4:18 Stage 1 MECO, sep  
 0002 T+5:00? Fairing 
  T+7:40? SECO 
 0004 T+7:45? Stage 2 sep  
 0108  Transtage burn 1 
 0113?  MECO-1 
 0610?  Transtage burn 2 
 0620?  Transtage deploy 
1973 Dec 14   At GEO 95W, drift 
1973 Dec 18   Move in at 105W 
1973 Dec   On orbit tests  GEO 105W 
1974 Jan 23   mv out 105W 
1974 Feb 1   Drifting E 80W 
1974 Feb 20?  Arrive at 13W, move in 
1974 Mar 30   GEO 13W 
1975 Sep 17   Temporary attitude failure 
1976 Sep 9   Failed 
1976 Oct    GEO 12W 
1977 Jan 18  0355   1436.11 35752 x 35821 x 0.3 GEO 12.9W 
1977 May 23    1436.17 35781 x 35794 x 0.5 GEO 13.0W 
1977 Sep 20  
 1435.64 35770 x 35784 x 0.7 GEO 71.7W+0.1W 
1977 Dec 1     1436.01 35776 x 35793 x 0.8 GEO 66.6W 
1978 Mar 22    1436.09 35772 x 35800 x 1.0 GEO 66.5W 
1978 Apr 1  
 1435.40 35751 x 35794 x 1.0 GEO 66.2W+0.17W 
1979 Oct 6    1436.20 35783 x 35793 x 2.1 GEO 57.2W+0.03E 
1979 Nov 25    1436.47 35773 x 35813 x 2.3 GEO 60.1W+0.1E 
1980 Jul   Drifting  GEO 141W dr 
1982 Aug 7    1437.19 35801 x 35815 x 2.8 GEO 119.3W+0.3E 
1985 Apr 22    1474.58 36412 x 36680 x 6.8 
1998 Aug 4    1474.59 36434 x 36639 x 15.9 

DSCS II B-4, satellite 9434 was launched in 1973 with F-3. The longest lived DSCS II satellite, it was finally deactivated in 1993 after two decades. From 1974 to 1977 it was over the Pacific; it was then moved to the Indian Ocean.


DSCS II B-4 
 

DateTimeEventOrbit  

1973 Dec 13   Launch by Titan IIIC  CC LC40 
   GEO 
1973 Dec 14   Begin drift  GEO 95W 
1973 Dec 21   On orbit tests  GEO 115W 
1974 Jan 30   Move out from 115W 
1974 Feb 15   Drifting W  GEO 150W+2W/d 
1974 Mar 1   Move in at 175E  GEO 175E 
1974 Mar 31  POR  GEO 175E 
1976 Oct    GEO 175E 
1977 Jan 22    1435.93 35623 x 35943 x 0.4 GEO 175.5E 
1977 Jul 14    1436.02 35779 x 35791 x 0.6 GEO 174.4E+0.0W 
1977 Jul   Move to IOR 
1977 Aug 31    1436.09 35785 x 35787 x 0.7 GEO 66.7E 
1979 Oct    GEO 65E 
1980 Jan 31    1436.10 35782 x 35791 x 2.5 GEO 66.1E 
  Move to 61E 
1980 Feb 29    1436.41 35777 x 35807 x 2.6 GEO 61.7E 
1980 Apr 30    1436.20 35772 x 35805 x 2.7 GEO 58.7E 
1980 Oct    GEO 60E 
1981 Feb 1    1435.95 35773 x 35793 x 3.3 GEO 59.7E 
1983 Feb 14    1436.07 35775 x 35796 x 4.9 GEO 60.0E 
1984 Jan 1    1436.21 35783 x 35794 x 5.6 GEO 59.3E 
1984 Jan 7   Spare status 
1984 Jan   Move to 66E 
1984 Jan 27    1436.06 35774 x 35797 x 5.6 GEO 65.8E 
1984 Aug 22    1436.21 35784 x 35792 x 6.1 GEO 66.2E 
1987 Apr 28    1435.96 35777 x 35790 x 8.4 GEO 66.3E 
1987 May 27    1435.89 35776 x 35789 x 8.4 GEO 67.5E+0.04W 
1987 Oct 20    1438.02 35814 x 35834 x 8.8 GEO dr 
1988 Dec 30    1438.00 35808 x 35839 x 9.8 GEO dr 
1989 Mar 30    1436.23 35763 x 35814 x 10.0 GEO 55.6W 
1990 Jan 1    1436.13 35776 x 35798 x 10.6 GEO 55.6W 
1992 Jun 1    1436.04 35783 x 35788 x 12.5 GEO 55.7W 
1992 Aug 24    1436.04 35780 x 35790 x 12.6 GEO 55.7W 
  Move to 60W 
1992 Sep 19    1436.36 35784 x 35799 x 12.7 GEO 59.1W 
1992 Oct 9    1436.35 35782 x 35800 x 12.7 GEO 60.1W 
  Move to 62W 
1992 Oct 25    1436.44 35784 x 35802 x 12.8 GEO 61.3W+0.1 
1992 Nov 11    1436.02 35781 x 35788 x 12.8 GEO 62.0W 
1993 Feb 1    1436.08 35744 x 35827 x 13.0 GEO 62.0W 
1993 Mar 11    1436.10 35782 x 35791 x 13.0 GEO 61.9W 
  Orbit raised 
1993 Mar 13    1442.10 35894 x 35913 x 13.0  
1993 Apr 12    1442.02 35890 x 35913 x 13.1 
1993 May   Orbit raise 
1993 May 17    1453.96 36123 x 36147 x 13.1 
1993 May   Orbit raise 
1993 May 31    1462.37 36286 x 36312 x 13.1 
1993 Dec 13   Decommissioned 
1993 Dec 17    1462.16 36283 x 36307 x 13.5 
1993 Dec 18 Orbit raise 
1993 Dec 20    1476.58 36292 x 36868 x 13.5 
1998 Jul 29    1476.63 36267 x 36885 x 15.4 

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