Wednesday, July 18, 2001

Intelsat 4A3

 1978-002A


The satellite was positioned over the Indian Ocean. The post launch report says that the apogee burn was on Jan 7; counting this as US local time means that it could be any of the first three apogees. Although the very first apogee is near the intended location, burn at first apogee would be very unusual for a 1970s Atlas Centaur launch. I therefore speculatively adopt a third apogee AKM firing.


Intelsat IVA F-3 
 

DateTimeEventOrbit  

1978 Jan 7  0015:00  Launch by Atlas Centaur  CC LC36 
  T+2:20 BECO 
  T+2:23 Booster sep 
  T+3:05 Insulation panels sep
  T+4:02 SECO 
  T+4:09 Atlas sep 
  T+4:19 MES-1 
 0019 T+4:31 Fairing 
 0025 T+10:20 MECO-1 189 km vrel 7.786 
 0039 T+24:53 MES-2 559 km vrel 7.320 
 0040 T+25:29 MECO-2 630 km  
 0043 T+28:34 Centaur sep 
 0050 T+35:34 end blowdown 
1978 Jan 7    640.4 549 x 35918 x 21.8 
 0700?  Apo 1 over 80E 
 1700? Apo 2 over 70W 
1978 Jan 7   AKM 
1978 Jan 8  0320?  Apogee burn? 
 0400? Apo 3 over 125E 
1978 Jan 8    1436.0 
1978 Mar 15    1436.13 35783 x 35790 x 0.4 GEO 74.2E 
1978 Jul 27    1436.11 35773 x 35800 x 0.1 GEO 74.1E 
1978 Aug 24   IOR Spare  1436.19 35777 x 35799 x 0.0 GEO 60.2E 
1978 Sep 30    GEO 60E 
1980   Contingency/domestic lease  GEO 60E 
1980 Oct 23    1436.08 35782 x 35790 x 0.1 GEO 60.2E 
1981 Jun    GEO 60.2E+0.01 
1982 Sep 15    1436.04 35775 x 35795 x 0.1 GEO 60.2E 
1982 Oct   mv out  GEO 60E 
1982 Nov 18   mv in  GEO 179E 
1982 Nov 18    1436.09 35782 x 35790 x 0.1 GEO 179.0E 
1982 Dec   POR Op Spare (C/DL)  GEO 179E 
1983 Sep 2    1436.09 35781 x 35791 x 0.0 GEO 179.0E 
1985 Jul 18    1436.12 35782 x 35791 x 0.0 GEO 178.9E 
1986 Jan 28    1436.01 35781 x 35788 x 0.1 GEO 179.1E 
1986 Feb 10   mv out 1436.36 35785 x 35798 x 0.2 GEO 178.8E+0.07W 
1986 Apr 2    1436.16 35785 x 35790 x 0.3 GEO 177.0E+0.02W 
1986 Apr 18  mv in 1436.07 35784 x 35788 x 0.3 GEO 177.0E 
1986 Oct 12    GEO 177.0E 
1988 Oct    GEO 177.0E 
1988 Nov 1    1436.02 35777 x 35792 x 2.7 GEO 177.2E 
1988 Nov 15   mv out 1438.58 35791 x 35879 x 2.8 GEO +0.6E/d 
1988 Nov 16   Orbit raise  1440.40 35862 x 35879 x 2.3 
1988 Nov 21    1441.13 35874 x 35895 x 2.8  
1988 Dec 31    1441.3 35877 x 35900 x 2.9 
1989 Mar 31    1441.2 35869 x 35904 x 3.1  
1989 Dec 31    1441.3 35699 x 36076 x 3.7 
1993 Jun 30    1441.3 35859 x 35916 x 6.9 

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