然而，当目标位置的互距离测量误差比较大时，CMKF的性能将急剧下降。
However, it has been found that the performance of CMKF degrades considerably when cross-range measurement errors of the target position are large.
而是存在一个不小的概率椭圆误差区域，因而无法精确确定被测目标的真实位置。
Moreover, there is still a large error area of probability ellipse, which makes the precise location cannot available.
线性相位误差导致机载SAR成像后目标的位置发生偏离，从而改变多普勒中心频率。研究线性相位误差的特点，提出一种改进的杂波锁定估计方法。
Linear phase error leads to that the estimated target location offsets from its original location in airborne SAR imaging, and the Doppler centroid frequency will be changed.
仿真实验表明，通过对频率自适应调整，使机动目标的位置、速度估计误差明显减小。
In the simulation test, the position error and velocity error of maneuvering targets was seen to be reduced greatly. It indicates that the adaptive adjustment of maneuvering frequency is effective.
由于运动目标机动性比较强，卡尔曼滤波预测的位置和真实位置存在较大的误差，容易导致下一步跟踪失败。
Due to the strong maneuverability of the moving target, there will be a relatively big discrepancy between the predicted and true position, which will cause failure in tracking for the upcoming frame.
结果表明：（1）目标位置（而非目标颜色）导致定位距离误差的变化，说明视觉的知觉—动作双系统理论适用于视觉记忆引导的目标定位；
Results indicated that: (1) dot's position (not color) effect the localization displacement error, so the Perception-Action double-system theory is still compatible under memory-guided localization;
其次，分别建立了雷达测量误差、初始对准误差和惯性元器件误差与导弹位置、姿态测量误差和目标位置测量误差的关系，并得到了其误差影响的方差表达式；
Then, a variance analysis method was used to analyze the seeker pointing angle error caused by airborne radar measurement noises, initial sensor errors and initial misalignment.
其次，分别建立了雷达测量误差、初始对准误差和惯性元器件误差与导弹位置、姿态测量误差和目标位置测量误差的关系，并得到了其误差影响的方差表达式；
Then, a variance analysis method was used to analyze the seeker pointing angle error caused by airborne radar measurement noises, initial sensor errors and initial misalignment.
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