Apparatus for correcting vehicular compass heading with the aid of the global positioning system
First Claim
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1. A vehicle navigation system comprising:
- a GPS receiver;
means for transforming outputs of said GPS receiver into a true heading;
means for indicating as magnetic heading and for transmitting said magnetic heading to a computing means;
said computing means, responsive to at least two values of said magnetic heading, for producing a compensation factor that, when used to compensate said magnetic heading, adjusts said magnetic heading to correspond to said true heading; and
said computing means including means for normalizing said two values of said magnetic heading.
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Abstract
An apparatus for compensating a magnetic heading as indicated by a vehicle'"'"'s magnetic compass so that the magnetic heading corresponds to a true heading as indicated by signals received in the vehicle from the Global Positioning System. The apparatus includes a computer for calculating compensation factors from successive positions occupied by the vehicle as it travels.
79 Citations
4 Claims
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1. A vehicle navigation system comprising:
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a GPS receiver; means for transforming outputs of said GPS receiver into a true heading; means for indicating as magnetic heading and for transmitting said magnetic heading to a computing means; said computing means, responsive to at least two values of said magnetic heading, for producing a compensation factor that, when used to compensate said magnetic heading, adjusts said magnetic heading to correspond to said true heading; and said computing means including means for normalizing said two values of said magnetic heading. - View Dependent Claims (2, 3, 4)
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Specification