NDLI: Solar compass chip

Content Provider	IEEE Xplore Digital Library
Author	Liebe, C.C.
Copyright Year	2001
Abstract	A solar compass chip (SCC) is a photosensitive chip with MEMS-based optics (pinhole aperture array) integrated on the chip itself. The MEMS-based optics enables the chip to image the sun. Image processing of the sun image is performed externally to the SCC (typically a processor connected to the SCC). The sun is observed for a period of time, say half an hour, and the angles to the sun are calculated. During that period of time, the sun will slew across the sky due to the sidereal rate. A circle on the surface of a sphere can be fitted to the arc on the sky that the sun traverses. The center of this circle is the rotation axis of the Earth. Besides performing the function of a compass, the SCC can be combined with a clock to establish a three-axis inertial-based coordinate system, or if the vertical is known, to determine the geographic position. A number of commercial applications in the automotive, agricultural, and maritime areas are identified.
Sponsorship	IEEE Sensors Council
Starting Page	779
Ending Page	786
Page Count	8
File Size	773339
File Format	PDF
ISSN	1530437X
Volume Number	4
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sun Cameras Apertures Optical sensors Space vehicles Silicon Propulsion Space technology Optical arrays Image processing sun sensor Attitude determination compass heading pinhole camera position determination
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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