Onboard high rate data transmission of massive remote sensing data using small size buffer

With the development of satellite remote sensing technology, types and amount of remote sensing datum are increasing rapidly, which put forward higher requirements to data transmission capability. Two schemes are proposed to reduce cache capacity requirements in the buffer capacity restricted condition while designing Advanced Orbit System (AOS) encoding for data transmission. In the first one, the data transmission rate is increased. And in the second, the data interface between compression unit and the AOS encoding unit is designed synthetically and the timing of compressed data output is decentralized so as to reduce the instantaneous data rate of the AOS encoding cache entry. The buffer capacity demands in both schemes are analyzed dynamically using simulation techniques. The results show that each scheme can reduce cache capacity requirements, while the second scheme requires less buffer capacity significantly. The schemes have been applied to the data transmission system products of certain satellite engineering project and have passed flying verifications. The approaches proposed in this paper have a reference value for the follow-up low cost, high rate transmission system applications.