Passive determination of ground target location

Details Passive determination of ground target location Passive determination of ground target location

2008-04-15

2008-04-15

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C342S458000, C701S208000, C701S225000

Reexamination Certificate

active

11472690

ABSTRACT:
Ground targets can be passively identified on uneven terrain from an observation point elevation above a known reference point, a line-of-sight inclination angle, an azimuth angle and a digital terrain elevation database wherein actual elevations of surrounding latitude and longitude coordinates are stored and retrievable. Using the observation point's elevation above the known reference point and using the line-of-sight elevation angle from the observation point to the ground target, an initial estimate of the latitude and longitude coordinates of the ground target is made and used as an index into a digital terrain elevation database.

REFERENCES:
patent: 4173414 (1979-11-01), Vauchy et al.
patent: 4954837 (1990-09-01), Baird et al.
patent: 5568152 (1996-10-01), Janky et al.
patent: 5969676 (1999-10-01), Tran et al.

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