1984-093C
The Syncom IV F2 satellite, also known as Leasat 2, was the first of a series designed specially for launch from the Shuttle. (The F1 satellite was built first, but launched second). The cylindrical satellite was spun up as it rolled out of the Shuttle payload bay in a maneuver known as the `frisbee' deployment, named after the plastic toy which is spin-stabilized by hand launch. An Orbus solid perigee motor derived from a Minuteman missile stage was used to place the satellite in geostationary transfer orbit, while a liquid apogee engine using twin Marquardt R4D rocket motors circularized the orbit at geostationary altitude.
The satellite was owned by Hughes Communications Services Inc., and leased to USN Space Command. It was initially stationed at 105W from CONUS (Continental United States) communications.
| Syncom IV F2 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1984 Aug 31 | 1313 | Deployed from OV-103 | |
| 1320:30 | Spinup by thrusters | ||
| 1984 Aug 31 | 1358 | Orbus PKM fired 59s | |
| (TLEs suggest 1401) | |||
| 1359 | PKM burnout | ||
| 278.74 309 x 15203 x 27.3 | |||
| 1839 | 278.76 312 x 15202 x 27.3 | ||
| 2041? | PKM ejected | ||
| 2300? | LAM-1 (PVA-1) | 345.37 294 x 19561 x 27.2 | |
| 1984 Sep 1 | 0500 | 340.43 311 x 19232 x 27.1 | |
| 1984 Sep 2 | LAM-2 (PVA-2) | 439.36 316 x 25216 x 27.0 | |
| LAM-3 (PVA-3) | 637.93 321 x 36017 x 26.9 | ||
| 635.81 278 x 35951 x 26.7 | |||
| 1984 Sep 3 | LAM-4 (AVA-1) | 813.99 9064 x 35935 x 10.6 | |
| 1984 Sep 4 | 2030? | LAM-5 (AVA-2) | 1397.10 34086 x 35952 x 3.6 |
| 1984 Sep 5 | 1433.58 35691 x 35783 x 3.5 | ||
| 1984 Sep 7 | 1436.43 35778 x 35807 x 3.5 GEO 105.2W+0.1W | ||
| 1984 Sep 9 | 1436.01 35774 x 35795 x 3.5 GEO 105.2W | ||
| 1984 Sep | Leasat CONUS | GEO 105W | |
| 1986 May 19 | 1436.09 35776 x 35796 x 1.9 GEO 105.4W | ||
| 1987 Jan 8 | 1436.09 35781 x 35791 x 1.5 GEO 105.2W | ||
| 1987 Jan 12 | mv out | 1448.28 35790 x 36259 x 1.4 GEO 114.3W+3.0W | |
| 1987 Mar | Leasat PAC | GEO 177W | |
| 1987 Apr 18 | mv in | 1436.24 35784 x 35794 x 1.1 GEO 176.4W | |
| 1987 Sep 7 | 1435.92 35780 x 35785 x 0.8 GEO 176.2W | ||
| 1987 Dec 9 | 1435.93 35778 x 35787 x 0.6 GEO 177.1W | ||
| 1987 Dec | Move to IOR | ||
| 1988 Jan 22 | 1436.06 35782 x 35788 x 0.6 GEO 72.5E | ||
| 1988 Jun 16 | 1436.10 35759 x 35813 x 0.5 GEO 73.3E | ||
| 1989 Jun 4 | 1436.07 35776 x 35795 x 1.0 GEO 73.0E | ||
| 1990 May 1 | 1436.04 35536 x 36034 x 1.8 GEO 72.5E | ||
| 1990 May 20? | mv out | ||
| 1990 Aug 29 | 1435.98 35782 x 35786 x 2.1 GEO 176.7W | ||
| 1990 Oct 1 | 1436.11 35782 x 35791 x 2.1 GEO 177.5W | ||
| 1992 Apr 23 | 1436.15 35784 x 35791 x 3.5 GEO 177.7W | ||
| 1994 Jan 11 | 1435.92 35777 x 35788 x 4.9 GEO 176.9W | ||
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