Dual Air Density Explorer was a set of 2 satellites, DADE-A and DADE-B, released as part of NASA's Explorer program. DADE-A and DADE-B was launched on 6 December 1975 at 03:35:01 UTC, by a Scout F-1 launch vehicle from Space Launch Complex 5, Vandenberg Air Force Base, California. The launch of the DADE satellites failed.