For a constellation program, RF Inter Satellite Linksrnbetween single satellites can support ranging andrncommunication for uploading mission data orrntelecommands. These data shall be uploaded from onernsingle ground station to the next reachable satellite andrntransmitted by the Inter Satellite Link to furtherrndedicated satellites. For this function each satellite hasrnto be equipped with 2 Antenna Scan Mechanismsrn(ASM) for data transfer in the K-Band.rnThe main challenges for the mechanisms are the highrnspeed position change requirement, low massrnrequirement and the design to cost approach.rnFurthermore a small envelope to accommodate the 2-rnaxes antenna scan mechanism was provided. Thernmaximum position change of +/- 180° needs to bernreached within 3 seconds. All requirements shall bernachieved by relying on the heritage design of ourrndownlink antenna pointing mechanism product.
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