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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: Selection Criteria Orbit RF Spectrum Data Rate Duty Factor Link Availabili

• launch vehicle: titan iv/centaur upper stage + z +x nsb #2 shf thrusters +x wing payload (ldr) +x wing crosslink shf antenna agile rcv uhf ehf agile wsb xmt uhf ec ehf ec nsb #1 spacecraft bus reaction wheel assemblies (scs) horizon sensors propellant tanks flexible substrate solar array panels-z - x thrusters-x wing crosslink antenna-x ...

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