In this paper the improved method, also named transformation of the polar, is used to predigest the iterative calculation, and the simulation calculation has been progressed.
文中运用了一种改进的球谐函数法，即换极法，大大简化了勒让德函数的递推计算，并进行了换极前后被动段扰动引力的仿真计算。
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.
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。
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