ECHO (AO-51)  
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Mission: AO-51 (AMSAT-OSCAR 51) is an Amateur Radio operated satellite built by AMSAT - the Amateur Satellite Organization. HAM radio operators can use AO-51 to communicate with one another across the Earth, participate in "Experiment Days", help educate students about space and fulsill their own curiousity as well.

Status: AO-51 launched on-time, aboard a Russian Dnepr rocket, 29 June 2004 at 0630 UTC. AO-51 was manifested as a secondary payload. All systems on-board were operational at the time of this writing. See the AMSAT AO-51 Status Page for the satellite's current condition.

SpaceQuest's Contribution: The following Spacecraft products are implemented in the AO-51 bus:



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