Navigation apparatus using a global positioning system
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United States of America Patent
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Sep 20, 1994
Grant Date -
N/A
app pub date -
Mar 9, 1992
filing date -
Mar 13, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A navigation apparatus utilizing a global positioning system having at least first and second satellite reception antennas installed on a navigation vehicle with a predetermined distance therebetween, a first azimuth computing unit for computing a first azimuth angle of the navigation vehicle from satellite radio waves received at the first and second antennas and a phase difference therebetween, a second azimuth computing unit for computing a second azimuth angle from a time change of antenna positions calculated from the satellite radio wave received at the first or second reception antenna, first and second multiplying units for multiplying outputs of the first and second azimuth computing units with predetermined coefficients respectively, an adding unit for adding outputs of the first and second multiplying units to produce a third azimuth angle, and a coefficient control unit for varying coefficient values of the first and second multiplying units in accordance with either the satellite arrangement or turning frequency of the navigation vehicle.
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