Architecture of cost-effective, advanced, high data rate baseband data handling system and realization for high resolution remote sensing satellites

摘要

Baseband Data Handling (BDH) system is one of the major subsystems in the Payload data downlink chain in all the remote sensing satellite missions. Its main functionality is to collect payload data, align data, compress the same and organize as space packets, multiplex these space packets into transfer frames that can be stored or downlinked for further transmission. Furthermore, encryption and channel coding are performed at the downlink chain. As the resolution of payload increases, data volume and number of ports from payloads increase drastically. To handle this high data rate, a modular and scalable architecture is required which focuses on realization cost and realization time. This paper focuses on advanced, cost effective, modular high data rate Data Handling System with many advanced features like DWT based Slice Redundant Compression system, On Board Radiometric Correction, Variable Integration time for payloads, configurable formatter, selectable compression ratio, programmable NUC coefficients for different TDI stages and SPI protocol for communication between different subsystems of BDH system. At present, this system is flown in a High Resolution Remote Sensing Satellite and providing excellent services. Same system will be reused for future missions.