任意模式的机载双基地合成孔径雷达方位非线性变标成像算法；适合于对SAR有一定基础的研究者；包含距离走动校正，方位非线性变标；变标因子推导等-Any mode airborne bistatic synthetic aperture radar imaging algorithm standard nonlinear variable orientation suitable for SAR have some basic researchers included walking distan