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Launch SuccessfulUnited States Air Force
Atlas F/MSD: Parcae 1A,B,C & MSD 1
Parcae 1A, B and C were passive ELINT satellites. MSD 1 was a dispenser of triplets of ocean surveillance satellites.
Friday, 30 April 1976
Atlas F MSD
Mission Data

🇺🇸United States Air ForceEst. 1947
Launch VehicleAtlas F MSD
Vehicle FamilyAtlas
Vehicle Record3 of 3 launches (100%)
Provider TypeGovernment
Agency Record972 successes / 106 failures (90%)
Success Streak68 consecutive
Mission TypeGovernment/Top Secret
Target OrbitLow Earth Orbit
Launch PadSpace Launch Complex 3W
Location🇺🇸 Vandenberg SFB, CA, USA USA
Orbital Launches This Year#39
Agency Launches This Year#9
Launches From This Pad81
Launches From This Site923
Status Note
The launch vehicle successfully inserted its payload(s) into the target orbit(s).
About Atlas F MSD
The Atlas E/F (or SB-1A) was an American expendable launch system and sounding rocket built using parts of decommissioned SM-65 Atlas missiles. It was a member of the Atlas family of rockets.
Launch Site
Space Launch Complex 3W · 34.6440°N 120.5930°W
Launch data from Launch Library 2 by The Space Devs.