1975-042A
The Intelsat 4 F-1 satellite was the first to be built but the last to be launched. It was launched in May 1975 and was first used as the Indian Ocean primary satellite. The satellite was over the Indian Ocean from 1975 to 1978, the Atlantic from 1978 to 1981, the Pacific during 1982, and back over the Atlantic from 1983 onwards.
| Intelsat IV F-1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1975 May 22 | 2204:00 | Launch by Atlas Centaur | CC LC36 |
| T+2:18 BECO | |||
| T+2:22 Booster sep | |||
| T+3:04 Insulation panel sep | |||
| T+4:07 SECO | |||
| T+4:09 Atlas sep | |||
| T+4:18 Centaur D-1A-0532-06 MES-1 | |||
| 2208 | T+4:30 Fairing sep | ||
| 2214 | T+10:21 Centaur MECO-1 | 190? x 1800? x 28 | |
| 2229 | T+25:02 Centaur MES-2 | ||
| 2230 | T+26:18 Centaur MECO-2 | ||
| 2232 | T+28:34 Centaur sep | 591 x 36625 x 26.0 | |
| 1975 May 23 | 0400? | Apo 1 over 90E | |
| 1500? | Apo 2 over 70W | ||
| 1975 May 24 | 0200? | Apo 3 over 120E | |
| 1200? | Apo 4 over 40W | ||
| 2300? | Apo 5 over 155E | ||
| 1975 May 24 | 2245 | AKM 33s | 1446.3 36182 x 37870 x 0.4 GEO 165E dr |
| 1975 Jul 13 | Operational as IOR Primary | GEO 63E | |
| 1977 Feb 24 | 1436.11 35785 x 35788 x 0.1 GEO 62.9E | ||
| 1978 Sep 30 | GEO 63E | ||
| 1978 Oct 26 | 1436.12 35778 x 35795 x 0.05 GEO 62.9E | ||
| 1978 Nov 19 | Replaced by IVA F-6 | ||
| 1978 Dec 9 | Move to AOR | ||
| 1978 Dec 21 | 1436.09 35785 x 35788 x 0.05 GEO 17.0W | ||
| 1979 Feb 3 | 1436.16 35783 x 35788 x 0.0 GEO 17.0W | ||
| 1979 Mar 13 | 1436.20 35782 x 35794 x 0.0 GEO 18.0W | ||
| 1979 Apr 19 | 1436.05 35778 x 35792 x 0.0 GEO 18.5W | ||
| 1979 Apr | AOR Major Path 2 | GEO 18.5W | |
| 1980 Dec 10 | 1436.25 35786 x 35792 x 0.2 GEO 18.0W | ||
| 1980 Dec | Adjust to 16.5W | ||
| 1981 Jan 2 | 1436.15 35778 x 35796 x 0.1 GEO 16.5W | ||
| 1981 Jul 7 | 1436.17 35786 x 35789 x 0.0 GEO 16.7W | ||
| 1981 Aug 16 | 1436.20 35782 x 35795 x 0.0 GEO 17.4W | ||
| 1981 Oct 6 | 1436.22 35785 x 35795 x 0.0 GEO 18.2W | ||
| 1981 Nov 15 | 1436.12 35776 x 35797 x 0.2 GEO 18.5W | ||
| 1981 Dec | AOR Major Path 2 | GEO 18.5W | |
| 1981 Dec 15 | mv out of GEO | 1440.46 35780 x 35963 x 0.2 | |
| 1982 Feb 16 | 1444.19 35781 x 36110 x 0.0 | ||
| 1982 Mar | mv in as POR Primary | ||
| 1982 Mar 27 | 1436.06 35774 x 35797 x 0.0 GEO 174.0E | ||
| 1982 Jul | POR Primary | ||
| 1982 Dec 2 | 1436.07 35779 x 35792 x 0.1 GEO 174.1E | ||
| 1982 Dec 6 | mv out of GEO | GEO 174E | |
| 1982 Dec 13 | 1427.92 35514 x 35738 x 0.1 GEO 139.8W+2.0E/d | ||
| 1983 Jan 25 | 1429.89 35591 x 35738 x 0.2 GEO 52.7W+1.5E/d | ||
| 1983 Jan 26 | on station | GEO 53W | |
| 1983 Feb 7 | 1436.19 35780 x 35796 x 0.1 GEO 52.9W | ||
| 1983 May | Domestic lease satellite | ||
| 1983 Sep | GEO 53W | ||
| 1984 Apr 28 | 1436.15 35781 x 35793 x 0.2 GEO 53.0W | ||
| 1984 Jun 2 | mv out | 1435.80 35780 x 35781 x 0.2 GEO 52.1W+0.07E | |
| 1984 Aug 4 | mv in | 1436.10 35781 x 35792 x 0.4 GEO 50.0W | |
| 1985 Apr | GEO 50W | ||
| 1986 Nov 24 | 1436.30 35779 x 35802 x 2.6 GEO 50.2W | ||
| 1987 Jul 6 | 1436.23 35781 x 35797 x 3.1 GEO 50.0W | ||
| 1987 Jul 14 | drifting | 1436.28 35781 x 35798 x 3.1 GEO 50.3W+0.05W | |
| 1987 Aug 19 | 1436.48 35780 x 35808 x 3.2 GEO 52.7+0.1W | ||
| 1987 Oct 26 | 1436.88 35785 x 35818 x 3.4 GEO 63.1W+0.2W | ||
| 1987 Oct 27 | Orbit raise | ||
| 1987 Oct 28 | 1443.51 35888 x 35974 x 3.4 | ||
| 1987 Nov 2 | 1450.75 36035 x 36109 x 3.4 | ||
| 1993 Jan 16 | 1450.70 36013 x 36130 x 8.1 | ||
| 1999 Apr 19 | 1450.67 36026 x 36116 x 11.8 | ||
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