Tags: Artificialsatellite, Satellite.
AO-51 is the in-orbit name designation of a now defunct (following battery failure) LEO amateur radio satellite of the OSCAR series; formerly known as ECHO built by AMSAT. It was launched on June 29 2004 from Baikonur Cosmodrome Kazakhstan on a Dnepr launch vehicle. It is in sun synchronous low Earth orbit.AO-51 contains an FM repeater with both 144 MHz (V band) and 1.2 GHz (L band) uplinks and 435 MHz (U band) and 2.4 GHz (S band) downlinks.
