FIELD: physics.
SUBSTANCE: invention relates to engineering physics and can be used in flight (full-scale) tests of aviation optoelectronic systems and their qualimetry based on analysis and processing of images of ground dashed resolution targets in the visible range. Method of determining linear resolution per pixel of optoelectronic system of aircraft is characterized by the fact that on ground along and across flight path of aircraft equipped with optoelectronic system, resolution targets, which are dark canvases of inextensible rubberized fabric with applied absolutely white strokes, are laid out and stretched horizontally as much as possible with the help of pegs. Then, at preset values of altitude and flight heading of aircraft, performing aerial survey of areas with arranged dashed resolution targets, processing aerial photographs and calculating an estimate of the linear resolution per pixel of the optoelectronic system of the aircraft as the arithmetic average of the values of estimates obtained by all decoder operators on all decoded images of the dashed resolution targets, each of which corresponds to the minimum width of the line in the recognized groups of lines, calculating the linear resolution on the terrain taking into account the contrast of the dashed resolution target. Simultaneously with the aerial survey when an aircraft flies over the dashed resolution target, the angle of inclination α of dashed resolution target is measured on the terrain, calculating the value of the linear resolution on the terrain of the optoelectronic system taking into account the angle of inclination of the dashed resolution target on the terrain α Li=Lp⋅cos α.
EFFECT: high accuracy of evaluating linear resolution on the ground of optoelectronic systems of manned and unmanned aerial vehicles.
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