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Attitude ground support system for the solar maximum mission spacecraftThe SMM attitude ground support system (AGSS) supports the acquisition of spacecraft roll attitude reference, performs the in-flight calibration of the attitude sensor complement, supports onboard control autonomy via onboard computer data base updates, and monitors onboard computer (OBC) performance. Initial roll attitude acquisition is accomplished by obtaining a coarse 3 axis attitude estimate from magnetometer and Sun sensor data and subsequently refining it by processing data from the fixed head star trackers. In-flight calibration of the attitude sensor complement is achieved by processing data from a series of slew maneuvers designed to maximize the observability and accuracy of the appropriate alignments and biases. To ensure autonomy of spacecraft operation, the AGSS selects guide stars and computes sensor occultation information for uplink to the OBC. The onboard attitude control performance is monitored on the ground through periodic attitude determination and processing of OBC data in downlink telemetry. In general, the control performance has met mission requirements. However, software and hardware problems have resulted in sporadic attitude reference losses.
Document ID
Document Type
Conference Paper
Nair, G. (Computer Sciences Corp. Silver Spring, MD, United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1980
Publication Information
Publication: NASA. Goddard Space Flight Center Fifth Ann. Flight Mech.(Estimation Theory Symp.
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19810002562Analytic PrimaryFifth Annual Flight Mechanics/Estimation Theory Symposium