Solrad 4B (GRAB-4B / Grab 3b), a U.S. Navy/NRL dual solar-radiation and classified ELINT satellite, launched on the final Scout X-2 from Point Arguello LC-D on 26 April 1962. A third-stage failure left it short of orbit about 225 nmi downrange.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 1st
- Only Scout X-2 flight
- Date and time
- 26 April 1962, 10:49 UTC
- Rocket
- Scout X-2
- Builder
- Vought
- Launch site
- Space Launch Complex 5, Vandenberg SFB, CA, USA
- Payload
- Astrophysics
- Launches in 1962
- 17th of 81