Satcom 1R

 1983-030A

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The RCA F payload, an Advanced Satcom bus built by RCA Astro Electronics, was launched in 1983 to replace Satcom 1 and was named Satcom 1R on reaching orbit. In 1988 the satellite became the property of GE Americom.

The post launch MOR records the apogee burn time as Apr 14 1430 EST (well, it says EDT but that is an obvious error). The final transfer orbit TLE from Apr 13 puts the spacecraft at 140W at that time at 7th apogee, while the first post-burn TLEs from Apr 15 put it at 90W. Perhaps a further burn occurred prior to the Apr 15 data - those TLEs put the vehicle at 103-107W on Apr 15-16. More likely, however is that the MOR document, despite its almost contemporary nature (dated 1984 Jul 26) and official provenance, is in error and the burn was delayed to 9th apogee on Apr 15 at 1700 UTC.

Satcom 1R
Date	Time	Event	Orbit
1983 Apr 11	2239	Launch by Delta 3924	CC LC17B
		T+0:59 SRM 1-6 burnout
		T+1:03 SRM 7-9 burn
		T+1:04 SRM 1-6 sep
		T+2:02 SRM 7-9 burnout
		T+2:03 SRM 7-9 sep
		T+3:43 MECO
		T+3:52 St 1 sep
		T+3:57 SES
		T+4:19 Fairing
	2249	T+9:53 SECO-1	163 x 211 x 29?
	2259	T+20:30 SES-2
	2301	T+22:37 SECO-2	163 x 3997
	2301	T+22:39 St 2 sep
	2302	T+23:21 TES
	2303	T+24:05 TECO	172 x 35786 (s)
1983 Apr 11	2304	T+25:32 Star 37E sep	634.16 173 x 35977 x 24.12
	2342	T+1:03:21 SES-3 depletion
	2342	SECO-3	304 x 4025 x 25.4
1983 Apr 12	0500	Apo 1 over 88E
	1600	Apo 2 over 75W
1983 Apr 13	0200	Apo 3 over 130E	191 x 36048 x 24
	1300	Apo 4 over 40W
	2300	Apo 5 over 173E
1983 Apr 14	1000	Apo 6 over 12E
	2000	Apo 7 over 144W
1983 Apr 14	1930	Star 30B burn (MOR)
1983 Apr 15	0700	Poss. Apo 8 over 55E
	1704?	Star 30B burn (TLEs)
	1730	Poss Apo 9 over 105W
1983 Apr 15			1483.09 36030 x 37380 x 0.3 GEO 101.5W+11W/d
1983 Apr 16			1472.1
1983 Apr 18			1450
1983 Apr 22			1432
1983 Apr 23			1436.1 35734 x 35846 x 0.2 GEO 139W
1983 Apr			GEO 139W
1984 Nov 12			1436.00 35768 x 35801 x 0.3 GEO 138.8W
1986 Oct			GEO 139W
1987 Jan 9			1436.07 35779 x 35792 x 0.0 GEO 139.0W
1990 Feb 14			1436.06 35784 x 35787 x 0.0 GEO 139.1W
1991 Jan 29			1436.02 35778 x 35791 x 0.0 GEO 138.9W
1991 Jan 30		move to 131W	1436.07 35778 x 35793 x 0.1 GEO 130.9W
1992 Jan 16			1436.04 35767 x 35803 x 0.1 GEO 131.0W
1992 Dec 27		orbit raise	1436.09 35774 x 35798 x 0.1 GEO 131.0W