TDRS-4

 1989-021B

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TDRS 4 (TDRS D before launch) was deployed from Discovery at 2112 on 1989 Mar 13, during mission STS-29R. The IUS burns were at 2209 on Mar 13 and 0324 on Mar 14, and a drift adjustment was made at 0700 on Mar 15. By 1989 Jun 10 TDRS 4 was on station replacing TDRS 1 as the TDRS EAST satellite at 41W.

TDRS 4
Date	Time	Event	Orbit
1989 Mar 13	1457:02	Launch from LC39B
	1459:06	SRB sep
	1500:39	80 km alt at 3:37
	1505:30	MECO 110km	88.03 65 x 289 x 28.5 (PK)
	1505:48	ET sep	88.18 72 x 296 x 28.5 (OMS dV)
	1536:58	OMS-2 2:21 68m/s
	1539:19	OMS-2 CO
	1617	PLBD open	90.51 296 x 303 x 28.46
	1927	ASE tilt
	2110:12	TDRS deploy from OV-103
	2210:12	IUS SRM-1
	2212:38	SRM-1 burnout
	2217:41	RCS-1
	2218:01	RCS-1 off
1989 Mar 14
	0316:57	Exit cone extended
	0322:37	SRM-1 sep
	0324:15	SRM-2 burn
	0326:04	IUS SRM-2 burnout
	0329:45	RCS-2
	0331:21	RCS-2 off
	0341	TDRS solar arrays deploy
	0404:58	SRM-2 sep
	0410:44	SRM-2 CAM burn
	0411:45	SRM-2 RCS depletion burn
1989 Mar 14			1433.89 35647 x 35839 x 0.1 GEO 178.9W+0.5E
1989 Mar 15	0700	mv, adjust drift
1989 Mar 15			1433.68 35639 x 35838 x 0.1 GEO 178.6W+0.6E
1989 Mar 21			1433.67 35618 x 35860 x 0.1 GEO 174.3W+0.6E
1989 Apr 15		mv in tests	1435.90 35776 x 35788 x 0.2 GEO 149.8W
1989 May 7			1435.81 35762 x 35799 x 0.2 GEO 148.7W
1989 May		Mv out
1989 May 20			1424.00 35529 x 35569 x 0.3 GEO 72.5W+3.0E
1989 Jun 10		mv in
1989 Jun 29		TDRS EAST	1435.99 35776 x 35792 x 0.4 GEO 40.7W
1990 Oct 21			1436.24 35771 x 35807 x 0.4 GEO 41.2W
1991 Jan 26			1436.02 35778 x 35792 x 0.7 GEO 40.9W
1992 Sep 6			1436.13 35785 x 35788 x 0.0 GEO 41.0W
1994 Apr 5			1436.10 35780 x 35792 x 0.0 GEO 41.0W
1996 Feb 4			1436.08 35776 x 35795 x 0.0 GEO 41.0W
1998 Apr 27			1436.14 35748 x 35826 x 1.3 GEO 41.0W