
Image credit: TRW
Image credit: Mike Acs

Image credit: TRW
Image credit: Mike Acs

S71-39481 (July 1971) — An artist’s concept showing TRW’s small lunar subsatellite being ejected into lunar orbit from the SIM bay of the Apollo 15 Service Module. The 80-pound satellite will remain in orbit a year or more, carrying scientific experiments to study space in the vicinity of the moon. The satellite carries three experiments: S-Band Transponder; Particle Shadows/Boundary Layer Experiment; and Subsatellite Magnetometer Experiment. The subsatellite is housed in a container resembling a rural mailbox, and when deployed is spring-ejected out-of-plane at 4 fps with a spin rate of 140 rpm. After the satellite booms are deployed, the spin rate is stabilized at about 12 rpm. The subsatellite is 31 inches long and has a 14 inch hexagonal diameter. The exact weight is 78.5 pounds. The folded booms deploy to a length of five feet. Subsatellite electrical power is supplied by a solar cell array outputting 25 watts for dayside operation and a rechargeable silver-cadmium battery for nightside passes.
Image credit: NASA JSC
Image source: NASA Images

Image credit: NASA ARC
Image source: NASA Images

Image credit: NASA ARC
Image source: NASA Images

Image credit: NASA ARC
Image source: NASA Images

Image credit: NASA
Image source: National Archives


The pod descends on parachutes and the crew flies to it’s preselected landing site.
Space World
April 1965, VOL. B-4.18
Image credit: TRW
Image source: Numbers Station

Image credit: NASA
Image source: Numbers Station



Image credit: NASA
Image source: NASA MSFC