Nimbus 4

  1970-025A

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Nimbus IV carried a new set of experiments, Launch was on 1970 Apr 8, again by Thorad Agena D. Nimbus IV achieved a 1095 x 1100 km x 99.9 deg orbit and operated for over ten years. 

Nimbus 4
Date	Time	Event	Orbit
1970 Apr 8	0817:56	Launch by Thorad Agena D
		T+0:39 SRM 1-3 out
		T+1:42 SRM 1-3 sep
	0820	T+3:44 Thorad MECO
		T+4:19 Agena MES-1, 235s
		T+4:28 Fairing
	0826:09	T+8:13 Agena MECO-1	158 x 1097 x 99.91
	0912:06	T+54:10 Agena MES-2, 5s 1003 m/s
	0912:11	T+54:15 Agena MECO-2
	0916:19	T+58:23 Agena sep
	0916:30?	Agena retro-1
	1002	T+1:44:00 TOPO eject
	1002?	Agena retro-2
1970 Apr 8			1092 x 1101 x 99.91
1977 Oct 18		Initial retirement
1980 Sep 30		End of ops
1982 Dec		Last tx