San Marco 3

 1971-036A

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The San Marco 3 satellite went into equatorial orbit from San Marco Launch Complex in 1971. SM-C was a 0.76m dia sphere with four 0.48m antennas, giving it a 1.7m span.

San Marco 3
Date	Time	Event	Orbit
1971 Apr 24	0732:29	Launch by Scout B	SMLC
		T+1:17 Stage 1 burnout
		T+1:23 Stage 2 burn
		T+2:04 St 2 burnout
		T+2:26 Fairing sep
		T+2:27 Stage 3 burn
		T+3:09 Stage 3 burnout
		T+6:21 St 3 sep
		T+6:26 Stage 4 burn
	0739:30	T+7:01 Stage 4 burnout
	0744:07	T+11:38 Despin
	0744:20	T+11:51 St 4 sep
			93.8 222 x 718 x 3.2
1971 Nov 29		Reentered

Payload:

• Drag balance density meter (CRA/Broglio)

• Omegatron mass spectrometer to study molec. nitrogen (GSFC/Michigan/Spencer,Carignan)

• NACE - Neutral Atmospheric composition mass spectrometer and temperature (GSFC/Newton)