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Satellite Communication - MIT OpenCourseWare

Satellite CommunicationCol John KeeseeSatellite Communications Architecture Identify Requirements Specify Architectures Determine Link Data Rates Design & Size each link Document your rationaleDefinition Uplinks Downlinks Crosslinks Relays TT & CUplinkDownlinkIntersatellitelinksRelay satelliteRelay satelliteRelay satelliteSensor satelliteSensor satelliteCrossover orIntersatellitelinksMission dataLaunchphaseTT&CTT&CSatelliteGround stationTT&CTracking, Telemetry and ControlThe communications architecture consists of satellites and ground stations interconnectedwith communications links. (Adapted from SMAD.)Architectures:Defined by Satellite -Ground Geometry Store & Forward Geostationary Molniya Geostationary/ Crosslink LEO/ CrosslinkAdapted from :Defined by Function System Function Tracking Telemetry & Command Data Collection Data Relay Satellite Design Onboard Processing Autonomous Satellite Control Network ManagementCommunications Architecture: Selecti

globalstar INTELSAT, inmarsat INTELSAT TELEDESIC, COMERCIAL, iridium,odyssey (gateway links) SPACEWAY, CYBERSTAR, ASTROLINK TELEDESIC iridium, odyssey (gateway links) Com’l. L Com’l. S Com’l. C Com’l. Ku Com’l. Ka 3 GHz 30 GHz UHF CKu SHF 300 MHz SATCOM Frequencies Usage ALL CAPS = Fixed Satellite ervice (FSS)

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