极坐标格式算法(PFA)是一种典型的聚束sar成像算法。

Polar format algorithm (PFA) is a typical image formation algorithm used in spotlight SAR.

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在小目标远场情况下，极坐标格式算法(PFA)能够基本消除MTRC，这种算法需要在空间频域进行从极坐标分布到直角坐标分布的二维插值。

Polar formation algorithm (PFA) can mostly compensate MTRC in the case of small target and distant field, which need the transformation from polar grid to Cartesian lattice.

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然后重点对三种聚束式SAR成像算法进行了讨论与比较，包括极坐标格式(PF)算法、线性调频测绘(CS)算法和距离走动(RM)算法。

Then three spotlight mode SAR imaging algorithms are discussed and compared, including polar format (PF) algorithm, chirp scaling (CS) algorithm and range migration (rm) algorithm.

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