Attitude Sensor and Gyro Calibration for MessengerThe Redundant Inertial Measurement Unit Attitude Determination/Calibration (RADICAL(TM)) filter was used to estimate star tracker and gyro calibration parameters using MESSENGER telemetry data from three calibration events. We present an overview of the MESSENGER attitude sensors and their configuration is given, the calibration maneuvers are described, the results are compared with previous calibrations, and variations and trends in the estimated calibration parameters are examined. The warm restart and covariance bump features of the RADICAL(TM) filter were used to estimate calibration parameters from two disjoint telemetry streams. Results show that the calibration parameters converge faster with much less transient variation during convergence than when the filter is cold-started at the start of each telemetry stream.
O'Shaughnessy, Daniel (Johns Hopkins Univ. MD, United States)
Pittelkau, Mark E. (Aerospace Control Systems, LLC Round Hill, VA, United States)
August 24, 2013
September 24, 2007
Publication: Proceedings of the 20th International Symposium on Space Flight Dynamics