Payload / Mission
SOLRAD 4B
Type
Astrophysics
Orbit
Low Earth Orbit (LEO)
SOLRAD (SOLar RADiation) 4B was a solar X-ray, ultraviolet, and electronic surveillance satellite. Developed by the United States Navy's United States Naval Research Laboratory, it was the fifth in both the SOLRAD and the GRAB (Galactic Radiation And Background) programs.