Research Of Target Automatic Positioning Technology In Airborne Photo-electricity Survey Equipment

Airborne Photo-electricity Survey Equipment which includes many high precisionequipment, for example, visible-light camera, infrared camera and laser range findercan realizes aviation surveying, target aiming and tracing and target positioning. It isfixed on manned planes or robot bomb, plays an important role in aviation measuring,aviation surveying, target tracing and civil aviation. This paper makes research intarget automatic positioning technology in airborne photo-electricity surveyequipment which aims to solve the problem that positioning technology in airbornephoto-electricity survey equipment depends on plane's some pivotal data.Target automatic positioning technology in airborne photo-electricity surveyequipment is a new technology that airborne photo-electricity survey equipment canrealize target positioning by itself. It has resolved the problem that airbornephoto-electricity survey equipment must get the vital data from the plane to realizetarget positioning. And at the same time, it avoids many fussy things which includeattitude data communications with the plane, time synchronization, the standard in thefixing, and so on. It can reduce the error of target positioning and the cycle of unitedebugging.This paper brings up double antanna GPS receiver method and three-pointpositioning method to realize target automatic positioning technology. Double antannaGPS receiver method establishes five coordinate systems from vidicon coordinatesystem to geodetic coordinate system basing on the realistic model of airbornephoto-electricity survey equipment. This method transforms the coordinate of target invidicon coordinate system to target's coordinate in geodetic coordinate system, thenrealize target automatic positioning technology. Three-point positioning method usethe theory of spacial geometry and target's positioning information in earth cartesian coordinate system, establish equations in earth cartesian coordinate system basing on thedistance between target and airborne photo-electricity survey equipment, then resolvethe equations to realize target automatic positioning technology. In allusion to thecharacteristics of double antanna GPS receiver method and three-point positioningmethod, we make error analysis on the two methods. At the base of Monte Karlomethod, we bring in wavelet analysis theory to optimize the errors. The precisition ofis reduced about70%. At last, we apply double antanna GPS receiver method andthree-point positioning method in practice and realize the target automatic positioningtechnology in airborne photo-electricity survey equipment in engineering for the firsttime at home.