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Taylor expansion of the differential range for monostatic SAR

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2 Author(s)
Rigling, B.D. ; Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA ; Moses, R.L.

The polar format algorithm (PFA) for spotlight synthetic aperture radar (SAR) is based on a linear approximation for the differential range to a scatterer. We derive a second-order Taylor series approximation of the differential range. We provide a simple and concise derivation of both the far-field linear approximation of the differential range, which forms the basis of the PFA, and the corresponding approximation limits based on the second-order terms of the approximation.

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:41 ,  Issue: 1 )