An efficient secured CCSDS based telemetry system for ISRO's near earth and deep space missions

摘要

This paper presents the details of an efficient, adaptive, secured and low complexity featured Consultative Committee for Space Data Systems (CCSDS) based telemetry system developed for ISRO's near earth missions carrying humans onboard and deep space missions to Moon, Mars etc., The present launcher telemetry systems are designed based on custom specific interface standards, protocols and data handling methods which are not suitable for interoperability required for above said missions. Hence there was a strong need to realise a system which will be based on recommendations provided by CCSDS to have end-to-end system solutions for the interoperability and cross-support requirements. CCSDS Telemetry Equipment (CTE) has been developed using in-house developed Digital Signal Processing (DSP) core embedded on an Actel's ProASIC3 Field Programmable Gate Array (FPGA) to cater to the major services of telemetry system such as source coding, packet telemetry, channel coding and encryption.