A target location and pointing algorithm for a three-axis stabilized line scanner (AMIDARS)

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Gimbals, Line Of Sight, Target Acquisition, Three Axis Stabilization, Tracking (Position), Imaging Techniques, Inertial Coordinates, Pointing Control Systems, Stabilized Platforms

Scientific paper

An algorithm is presented for calculating the location of a target and for pointing other imaging sensors to it, given the position of an aircraft, its attitude, and its altitude and the gimbal angles of the stabilized platform. The algorithm uses geometric relationships to define the line of sight (LOS) direction in inertial space and to determine the position of the center of a scan line where the LOS intersects the ground. The direction of a scale line passing through that point is also calculated completely defining the location of any target on a scan line. The ground dimensions obtained form this procedure are then related to a point of known latitude and longitude to define the overall target location.

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