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AO-51
AMSAT-OSCAR 51 or AO-51 is the in-orbit name designation of a now defunct (following battery failure) Low Earth orbit, 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 (rocket), Dnepr launch vehicle. It is in Sun-synchronous orbit, sun synchronous low Earth orbit. AO-51 contained an Frequency modulation, FM repeater with both 144 MHz (VHF) and 1.2 GHz (L band) Telecommunications link#Uplink, uplinks and 435 MHz (UHF) and 2.4 GHz (S band) Telecommunications link#Downlink, downlinks. It also contained a digital subsystem that transmitted telemetry on 70 cm and provided a complete AMSAT-OSCAR 16, PACSAT Bulletin board system, BBS that could be configured on both V band and S band uplinks. As well, there was a 10-meter Phase-shift keying, PSK uplink. AO-51 had four VHF receivers, two UHF transmitters, six modems, and 56 channels of telemetr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio Satellite
An amateur radio satellite is an artificial satellite built and used by amateur radio operators. It forms part of the Amateur-satellite service. These satellites use amateur radio frequency allocations to facilitate communication between amateur radio stations. Many amateur satellites receive an OSCAR designation, which is an acronym for Orbiting Satellite Carrying Amateur Radio. The designation is assigned by AMSAT, an organization which promotes the development and launch of amateur radio satellites. Because of the prevalence of this designation, amateur radio satellites are often referred to as OSCARs. These satellites can be used free of charge by licensed amateur radio operators for voice ( FM, SSB) and data (AX.25, packet radio, APRS) communications. Currently, over 18 fully operational amateur radio satellites are in orbit. They may be designed to act as repeaters, as linear transponders, and as store and forward digital relays. Amateur radio satellites have helpe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
