Device for determining the direction of a line of sight

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356152, 324226, G01B 700, G06F 1520

Patent

active

043331548

ABSTRACT:
In a device for determining the direction of a line of sight, or the orientation of a sighting trihedron associated with said line of sight, defined by a magnetic azimuth angle, an elevation angle and an inclination angle determined in a reference trihedron, a sighting unit defines the sighting trihedron and a gravimetric detector measures components of the gravity acceleration vector in the sighting trihedron. A microprocessor computes the elevation and inclination angles in terms of the components of the gravity acceleration vector, and a magnetometric detector measures components of the earth magnetic field vector in the sighting trihedron. The sighting and reference trihedrons define long and cross axes and the microprocessor computes the components of the earth magnetic field vector along long and cross axes in terms of the components of the earth magnetic field vector. The magnetic azimuth angle is computed in terms of the components along the long and cross axes.

REFERENCES:
patent: 3205303 (1965-09-01), Bradley
patent: 3723005 (1973-03-01), Smith et al.
patent: 4028725 (1977-06-01), Lewis
patent: 4070674 (1978-01-01), Buell et al.
patent: 4148026 (1979-04-01), Gendreu
patent: 4209254 (1980-06-01), Reymond et al.

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