Abstract:

In the first mission of satellite CE-2 travel from orbit of Luna to Libration points 2 in the Sun-Earth system, owing to ability of the ground equipment, the telemetry and data transmission system must conquer the technical difficulties, which are the problems of long distance and weak signal. Therefore some technical experiments are developed, which are study of weak signal capture and tracking, study of low loss demodulation, high performance of encode technology, design of tracking, telemetry and command （TT&C） and data transmission system and test experimentation. Experimental results indicate that telemetry and data transmission system has the ability of 1 500 000~1 700 000 km distance communication, it will be significantly useful for reference to the deep space exploration.