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OSCAR-1 was the first amateur-built satellite to reach orbit, launched on December 12, 1961 as a secondary payload aboard a Thor-Agena rocket from Vandenberg Air Force Base. Built by a group of radio amateurs in California, it transmitted a continuous Morse code beacon on 144.983 MHz for approximate...
AO-7 (OSCAR-7) is an amateur radio satellite constructed by volunteers and launched into low Earth orbit by the Radio Amateur Satellite Corporation (AMSAT) in 1974. After its batteries failed in 1981, the satellite ceased transmissions and was presumed permanently lost. However, it unexpectedly resu...
SO-50, also known as SaudiSat 1C, is an amateur radio satellite launched by Saudi Arabia in 2002. It orbits the Earth in a low-Earth orbit and operates as an FM voice repeater for use by amateur radio operators worldwide. The satellite requires a 67.0 Hz CTCSS tone to activate its transmitter, after...
AO-91, also known as Fox-1B, is an amateur radio CubeSat launched by AMSAT in November 2017. It carries a U/V FM voice transponder for amateur radio communication and experimentation, and is part of the Fox-1 series of satellites designed to support education in radio technology. AO-91 operates in a...
