Method of generating geometric heading and positioning system using the same method
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United States of America Patent
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Aug 4, 2015
Grant Date -
Jul 18, 2013
app pub date -
Jan 11, 2013
filing date -
Jan 12, 2012
priority date (Note) -
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Abstract
A method of generating a geometric heading during positioning is provided. The method includes the following steps: estimating a current declination information of a current position according to a declination database, wherein the declination database gathers a magnetic map and a plurality of declination information corresponding to a difference between a magnetic north and a geometric north at all grid positions on the magnetic map; generating a predicted heading according to an angular velocity reading of a gyroscope and a magnetic heading reading of a magnetometer; and generating the geometric heading according to the current declination information of the current position and the predicted heading.
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