Spatial variation correction method for high squint SAR subaperture imaging based on two-stage filtering
A two-stage filtering and correction method technology, which is applied in radio wave reflection/reradiation, radio wave measurement systems, instruments, etc., can solve model failure, affect imaging quality, distance envelope and two-dimensional space variation of azimuth and phase, etc. problem, to achieve the effect of uniform correction of space variability
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[0091] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0092] refer to figure 1 According to the embodiment of the present invention, the sub-aperture imaging spatial variation correction method for high squint SAR sub-aperture imaging based on two-stage filtering in the dive section specifically includes the following steps:
[0093] Step 1, first analyze the echo signal of high strabismus, which mainly includes the following three parts:
[0094] (1a) Instantaneous slope distance model
[0095] During the move...
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