Research and Application of On-orbit Software Updating Technology for Spacecraft Based on Terrestrial-Satellite Communication Links

With the rapid development of satellite communication technology, the need for remote updating and maintenance of on-orbit satellite system is increasing day by day. In this paper, the uploading strategy, data management, data transmission and reliability of on-orbit update are studied, and the solution of on-orbit injection system is obtained. According to the research conclusion, the design and application of the on-orbit injection system is completed based on DSP microprocessor. This system focuses on the hardware design, data storage scheme, device selection, on-orbit update startup and update strategy, and the evaluation of practical application effect. The research results show that the system successfully completed the on-orbit injection task, and the function, performance and reliability meet the requirements. The research of on-orbit injection strategy and reliability safety in this paper is reasonable and feasible, which can provide theoretical support and technical guidance for on-orbit maintenance of spacecraft.