On-board correction of systematic error of Earth sensors

Alex, TK and Shrivastava, SK (1989) On-board correction of systematic error of Earth sensors. In: IEEE Transactions on Aerospace and Electronic Systems, 25 (3). pp. 373-379.

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Abstract

Infrared Earth sensors are used in spacecraft for attitude sensing. Their accuracy is limited by systematic and random errors. Dominant sources of systematic errors are analyzed for a typical scanning infrared Earth sensor used in a remote-sensing satellite in a 900-km sun-synchronous orbit. The errors considered arise from 1) seasonable variation of infrared radiation, 2) oblate shape of the Earth, 3) ambient temperature of sensors, 4) changes in spin/scan period, and 5) misalignment of the axis of the sensors. Simple relations are derived using least-squares curve fitting for onboard correction of these errors. With these, it is possible to improve the accuracy of attitude determination by eight fold and achieve performance comparable to ground-based post-facto attitude computation.

Item Type:	Journal Article
Publication:	IEEE Transactions on Aerospace and Electronic Systems
Publisher:	IEEE
Additional Information:	Copyright 1989 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	10 Aug 2010 08:11
Last Modified:	19 Jul 2011 12:12
URI:	http://eprints.iisc.ac.in/id/eprint/31241

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