Method for correcting azimuth angle data of a navigational...

Details Method for correcting azimuth angle data of a navigational... Method for correcting azimuth angle data of a navigational...

2005-10-18

2005-10-18

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490, C701S213000

Reexamination Certificate

active

06956525

ABSTRACT:
A method for correcting azimuth angle data of a navigational device, which is installed in a vehicle, includes the steps of enabling the navigational device to periodically receive a position information signal that is transmitted from a global positioning system (GPS) service provider and that contains an azimuth angle of the vehicle, obtaining velocity data of the vehicle, obtaining magnetic north data by means of an electronic compass, and enabling the navigational device to correct the azimuth angle contained in the position information based on the magnetic north data when the velocity data is lower than a reference value. A navigational device that implements the aforesaid method is also disclosed.

REFERENCES:
patent: 5349531 (1994-09-01), Sato et al.
patent: 6253154 (2001-06-01), Oshizawa et al.
patent: 6784840 (2004-08-01), Menegozzi et al.

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