在卫星导航定位系统中，多普勒频率偏移是影响接收机性能的关键因素之一。
In the satellite navigation and positioning system, Doppler shift is one of the key problems that may degrade the performance of the satellite receiver.
分析误差传递因子相角等因素对有限差分波动方程偏移造成的相位畸变问题，找到相应规律。
Cut-error that made from the finite difference mirgation, phase angle of error transfer function and factors that determine their values are discussed.
偏移速度是影响偏移效果的关键因素。
Migration velocity is the key factor which influences the migration result.
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