On-board satellite switch controller for multi-beam communication satellite

A compact and highly reliable onboard satellite switch controller (SSC) is proposed for a multibeam communication satellite, the Engineering Test Satellite VI. In order to reduce the size, weight, and power consumption of the SSC and to increase its reliability, a latchup-free high-density (64-kb) memory, a microprocessor, and two types of CMOS/bulk LSIs (8 K gate each) have been developed. Moreover, to realize immunity from cosmic ray-induced soft-error, a modular redundant with adaptive error correction scheme is adopted. As a result, the developed onboard SSC is free from soft-error, and the SSC´s survival probability is estimated to be as high as 0.99 for a ten-year mission. The weight and power consumption have been reduced to one fourth and one tenth of those of a conventional system, respectively