Design and Implement of High-speed Receiving Cache System of the Satellite
Jingxing SONG, Yan ZHU, Jianing RAO, Junshe An · Chinese Journal of Space Science · 2023
Recently with the development of space technology, the explosive growth of remote sensing satellite image data and the demand for multi-mode operation of a remote sensing satellite camera, have produced the differential processing of different data. At the same time, it also has brought great challenges for inter-satellite data processing. The purpose of this research is to solve the problems of inter-satellite data processing, such as gigabits per second high-speed data transceiver, datas storage, file cache and so on. This study investigates the development of remote sensing satellite data processing, analyzes the transmission principle of SerDes, and formulates the operation strategy of documented class of high-speed cache. Based on hardware design and software development, the project of high-speed space-borne data processing unit with 3.2 bit·s–1 level and 64 data documents is completed. The test results show that based on SSLLP (Satellite Serial Link Layer Protocol), the high-speed serial data reception is correct and the cache strategy is effective. Most important of all, the system is efficient and reliable. This design has been applied to some on-orbit model missions, providing a reference to the design of high-speed receiving cache system of the satellite.