Overlay Video Display of Target Position Utilizing GPS, Compass, and Rangefinder Data

Martin D. La Rocque

Abstract:	The object of this system is to display on a monitor, the location coordinates (latitude, longitude and heading) of a selected target viewed through a video camera. The bearing and slant angle (tilt) from the camera to the target is measured with a three-axis electronic compass. The slant range (distance) to the target is measured with a manual laser rangefinder. Calculation of the delta latitude and delta longitude from the camera position provides the location of the target. A character overlay superimposes the target location data on the video camera output to a video monitor. This system was developed to obtain the coordinate position of a remote target viewed through a video camera, whose GPS location is known. The target may be a natural disaster, fire, accident or for search and rescue purposes. The target coordinate data message may be sent directly to the Character Overlay and/or sent by radio link for display on a remote mapping program monitor.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	874 - 880
Cite this article:	La Rocque, Martin D., "Overlay Video Display of Target Position Utilizing GPS, Compass, and Rangefinder Data," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 874-880.
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