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Algorithms were written to accurately process the high speed gyro attitude data. Data communication between subsystems in the HERCULES system was controlled by the software. Subsystem configuration, operating modes, self-testing, and resource management was performed by the operational software. Testing was performed on the HAP unit and operational software. Hardware and software performance was analyzed and is presented.","abstract_html":"The design and analysis of a microprocessor-based gyro attitude data processing system used to geolocate natural phenomena from space was performed. Operational software was written and a HERCULES Attitude Processor (HAP) unit was built and tested. Strict adherence to worst-case timing design criterion was a prime hardware design consideration. Weight, volume, and power requirements were also addressed. Redundancy was included for critical time maintenance functions. Hardware performance and accuracy was calculated and measured. 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