System for Correlating Electronic Distance Measurement and Aerial Photography for the Extension of Geodetic Control.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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The invention is a system designed to combine in a unique manner, precision timing, precision photogrammetric resection, radar mapping and electronic distance measurement to extend accurate geodetic control. This system enables a common grid coordinate system to move without the delay normally attendant for accurate location of electronic guidance beacons and distance measuring equipment DMEgrid beacons. There now exists four airborne real time sensor systems that utilize precision distance measurement to locate their present position and the position of the targets indicated by the sensors, in a geodetic coordinate system. These systems are active high resolution mapping and surveillance radar and precise direction finding systems to survey large areas. The systems are tied by electronic distance measuring to geodetic ground control previously surveyed. The invention utilizes a low flying aircraft whose course and location is precisely known. The aircraft, known as an electronic location station ELS, is photographed as it flys over the unknown area by either an aircraft or satellite. The precision location information is combined with a series of photos in a photogrammetric process thereby extending geodetic control into the unknown area.
- Cartography and Aerial Photography