Navstar 1

 1978-020A

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The first Navigation Development Satellite, SVN 1 (Satellite Vehicle Number 1), was launched on 1978 Feb 22 by an Atlas F with a twin SVS upper stage from Vandenberg. SVN 1 became operational on 1978 Mar 31, using the identifier signal PRN 4. It was later replaced by SVN 8.

Navstar 1
Date	Time	Event	Orbit
1978 Feb 22	2345?	Launch by Atlas F/SVS	V SLC3E
		T+2:04 Booster sep
		T+5:21 SECO
	2351?	T+6:00? S+0 Atlas sep at 172 km 6.660km/s 0 deg	-2622 x 172
		S+0:17 SVS Stage 1 burn
		S+1:11 Stage 1 burnout	36? x 172?
	2352?	S+1:39 Stage 1 sep
		S+1:56 SVS Stage 2 burn	154? x 20185? x 63
	2353?	S+2:41 Stage 2 burnout
	2358?	S+6:56 Stage 2 sep	161 x 20292 x 63.0
1978 Feb 25	1302?	AKM burn Star 27 S/N 0017-8
1978 Feb 28			704.7 19953 x 19755 x 63.3
1978 Mar			718.7 20095 x 20308 x 63.3
1978 Mar 5		Nav systems on
1978 Mar 31		Operational
1980 Jan 25		Out of operational service
1981 Feb		Operating on crystal oscillator
1985 Jul 17		end of ops