Abstract
The Shuttle Computer Complex provides the on-board data processing capability for Space Shuttle Orbiter avionics. It performs the data processing necessary for guidance, navigation, and control; pay-load handling and management; and performance monitoring functions. It is made up of five interconnected but independent general purpose computers to satisfy the overall avionics requirements in fault tolerance, partitioning, and functional isolation. Each general purpose computer consists of a central processing unit and an input/output processor; with the former performing all computations associated with the application programs, and the latter controlling the transfer of information between the computer and other subsystems of the Space Shuttle. The functions, characteristics, mechanization, and operation of the Shuttle Computer Complex are described in this paper.
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