RM 20 (P72-2), a USAF Space Test Program experimental satellite with IR/UV horizon, aerosol, and ionosphere experiments; lost when the Atlas F failed at liftoff from Vandenberg after a flame-pit explosion.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 5th
- of 9 SM-65F Atlas flights
- Date and time
- 13 April 1975, 00:51 UTC
- Rocket
- SM-65F Atlas
- Builder
- Convair
- Launch site
- Space Launch Complex 3W, Vandenberg SFB, CA, USA
- Payload
- Earth Science
- Launches in 1975
- 31st of 132