Celestial compass kit
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United States of America Patent
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Jul 4, 2017
Grant Date -
Jul 5, 2012
app pub date -
Nov 1, 2011
filing date -
Sep 15, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A celestial compass kit. The kit includes an inclinometer, a camera system with a special telecentric fisheye lens for imaging at least one celestial object and a processor programmed with a celestial catalog providing known positions at specific times of at least one celestial object and algorithms for automatically calculating target direction information based on the inclination of the system as measured by the inclinometer and the known positions of at least one celestial object as provided by the celestial catalog and as imaged by the camera. The telecentric fisheye lens produces an image on the sensor located at or near the focal plane which remains spatially constant within sub-micron accuracies despite thermally produced changes in the focus of the lens.
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