Design and Application of OBDH Subsystem for Gaofen-4 Satellite

Gaofen-4 satellite is the first Chinese GEO optical remote sensing satellite with high resolution. Taking advantages of its permanent position over the equator, Gaofen-4 satellite combines the characteristics of high temporal resolution and high spatial resolution. OBDH subsystem is the important subsystem of the satellite. In addition to the traditional telecommand function and telemetry function, compared with the OBDH subsystem of other remote sensing satellites, Gaofen-4 satellite extends the functionality of autonomous management, adds new autonomous layout function of satellite load mission and optimizes telemetry data transfer modes, as well as the characteristics of universe, high reliability and long-life. This paper describes the design and application of Gaofen-4 satellite OBDH subsystem, focuses on the characteristics depicted on above, and presents the on-orbit verification results.