TT&C and Communication Technology

Similar to the TT&C and communication system of a near-Earth spacecraft, the deep space TT&C and communication system has also three basic missions. The first mission is to measure and predict the position of the spacecraft. The second mission is to obtain the health status and scientific exploration data of the probe through the downlink. The third mission is to make corresponding controls on the probe based on the remote commands transmitted via the uplink. The three basic missions are also commonly referred to as TT&C, namely tracking, telemetry and command.