In the signal processing software testing for synthetic aperture radar (SAR), the verification for algorithms is professional and has a\nvery high proportion. However, existing methods can only perform a degree of validation for algorithms, exerting an adverse effect\non the effectiveness of the software testing. This paper proposes a procedure-based approach for algorithm validation. Firstly, it\ndescribes the processing procedures of polar format algorithm (PFA) under the motion-error circumstance, based on which it\nanalyzes the possible questions that may exist in the actual situation. By data simulation, the SAR echoes are generated flexibly and\nefficiently. Then, algorithm simulation is utilized to focus on the demonstrations for the approximations adopted in the algorithm.\nCombined with real data processing, the bugs concealed are excavated further, implementing a comprehensive validation for PFA.\nSimulated experiments and real data processing validate the correctness and effectiveness of the proposed algorithm.
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