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对纯方位最小二乘估计器，在已知某时刻一个观测距离的情况下，导出了一种伴随型的目标速度估计器．该算法嵌入原最小二乘估计器之中，计算简单且便于工程应用．
For a purely azimuth least square estimator, a concomitant target velocity estimator is derived under the condition that an observation distance is known at a certain time. The algorithm is embedded in the original least squares estimator, the calculation is simple and easy to engineering applications.