Taylor expansion of the differential range for monostatic SAR |
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Authors: | Rigling BD Moses RL |
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Institution: | Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA; |
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Abstract: | 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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