Method for accurately estimating Doppler rate in large-strabismus SAR (Synthetic Aperture Radar) imaging mode
A technology of Doppler frequency modulation and imaging mode, applied in the field of radar, can solve the problems of inability to accurately estimate Doppler frequency modulation, space-variable phase error, etc.
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[0057] refer to figure 1 , a method for accurately estimating Doppler modulation frequency in SAR imaging mode, comprising the following steps:
[0058] In step 100, the echo data is compensated for range walk, corrected for range curvature, and performs secondary range compression to obtain a range-compressed dual-time domain signal;
[0059] The echo equation of squint SAR is:
[0060] S squint ( τ , t ) = exp ( j · Kr · ( τ - ...
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