An onboard star identification algorithmThe paper presents the autonomous Initial Stellar Acquisition (ISA) algorithm developed for the X-Ray Timing Explorer for prividing the attitude quaternion within the desired accuracy, based on the one-axis attitude knowledge (through the use of the Digital Sun Sensor, CCD Star Trackers, and the onboard star catalog, OSC). Mathematical analysis leads to an accurate measure of the performance of the algorithm as a function of various parameters, such as the probability of a tracked star being in the OSC, the sensor noise level, and the number of stars matched. It is shown that the simplicity, tractability, and robustness of the ISA algorithm, compared to a general three-axis attiude determination algorithm, make it a viable on-board solution.
Document ID
19930067419
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ha, Kong (Fairchild Space & Defense Corp. Germantown, MD, United States)
Femiano, Michael (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: AIAA Guidance, Navigation and Control Conference, Monterey, CA, Aug. 9-11, 1993, Technical Papers. Pt. 2 (A93-51301 22-63)
Publisher: American Institute of Aeronautics and Astronautics
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking