Document Type and Number:
Japanese Patent JPS5643481
Kind Code:
B2
Abstract:
Apparatus for checking and correcting the heading alignment of an inertial platform carried by a vehicle by comparison with a base station having equipment for determining the orientation of a datum line at the base station relative to a fixed reference direction, comprises a sighting mark on the vehicle, and a mirror fixed to the base station in which an image of the sighting mark may be visible to an observer in the vehicle only when the vehicle is located on a base line substantially normal to the mirror. A movable aiming mark in the vehicle may be aligned with the image and a pick-off develops an electrical signal indicating the position of the aiming mark relative to the fore-and-aft axis of the vehicle. This signal, and further signals indicating the heading of the datum line and the base line relative to the reference direction are applied to a navigation computer in the vehicle.
Application Number:
JP6616374A
Publication Date:
October 13, 1981
Filing Date:
June 12, 1974
Export Citation:
International Classes:
G01C21/16; G01C25/00