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Magellan spacecraft - Attitude determination, updates and gyro parameter calibrationA detailed mathematical algorithm for onboard autonomous attitude determination and parameter calibration in the Magellan Venus-orbiting spacecraft has been developed, and its performance has been estimated. This algorithm uses a contamination reduction attitude profile and retractive star scan maneuvers to minimize the interparameter error contamination and to maximize the parameter observability. The details of the underlying theory and strategy are described, and an extensive performance analysis with worst-case parameter errors is reported which indicates that the in-flight attitude determination unit/parameter calibration (ADU/PC) algorithm will be able to meet all the different mission phase requirements with comfortable margins. The problem of nonexact mapping retrace due to uncertain performance of control authority is addressed, and its lack of impact on the system performance is demonstrated.
Document ID
19860062690
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Huang, W. H.
(Martin Marietta Corp. Denver, CO, United States)
Reddy, N. S.
(Martin Marietta Corp. Space Systems Div., Denver, CO, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
AIAA PAPER 86-2042
Accession Number
86A47428
Funding Number(s)
CONTRACT_GRANT: JPL-956700
Distribution Limits
Public
Copyright
Other

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