Descending track spotlight SAR (synthetic aperture radar) positioning method based on image matching
A technology of synthetic aperture radar and positioning method, which is applied in the field of radar image target positioning, which can solve the problems of inability to realize large squint beam spotting synthetic aperture radar positioning and low positioning accuracy of SAR platform, achieve good application value and reduce the steps of coordinate conversion , the effect of improving the accuracy
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[0028] refer to figure 1 , the implementation steps of the present invention include as follows:
[0029] Step 1. Taking the ground point target T as the origin, establish the geometric configuration diagram of radar positioning in the Beitiandong coordinate system.
[0030] refer to figure 2 , the specific implementation of this step is as follows:
[0031] Take the origin of the coordinate system as the ground point target T, set the positive direction of the X-axis to the north, the positive direction of the Y-axis to the sky, and the positive direction of the Z-axis to the east, and establish the X-Y-Z three-dimensional coordinate system of Beitiandong;
[0032] Take any point on the X-Y-Z three-dimensional coordinate system as the actual position point A of the SAR, and project the actual position point A of the SAR onto the ground to obtain a position point O, whose coordinates are (x, y, 0);
[0033] Take the slant distance AT between the radar and the ground point ...
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