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FedSat (Australia's 'Federation Satellite') is an Australian scientific research satellite launched from Tanegashima Space Center, Japan by a NASDA H-IIA launch vehicle in December 2002 (NASDA is now merged with JAXA). The satellite was developed by the Cooperative Research Centre for Satellite Systems, a cooperative made up of several universities, commercial organisations and government bodies. The ground station is at the Institute for Telecommunications Research, part of the University of South Australia, near Adelaide. Since 2005 it was operated by the Australian Department of Defence. The spacecraft's battery failed in May 2007 and the mission has been terminated.

The satellite has five payloads:

  • Communications Payload: A collection of three components (UHF transponder, Ka-band transponder and base-band processor) used to perform several experiments in satellite communications.
  • High Performance Computing Experiment: A reconfigurable computer based on a Xilinx FPGA, the first of its kind to be used in space.
  • GPS Payload: A Global Positioning System receiver built by NASA.
  • NewMag Payload: A magnetometer built by the University of Newcastle, Australia, used to take measurements of the Earth's magnetic field near its poles.
  • Star Camera: An experimental star camera built by the University of Stellenbosch, used to determine the position of the satellite in space by analysing images of surrounding stars.

The satellite platform, comprising the structural/thermal components, power system, attitude control system, onboard computer and groundlink, was originally developed in the UK by Space Innovations Limited. It was later completed along with integration of payloads in Canberra, Australia.

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