An explicit functional relation of the point position variance of angular resection with observation value was derived.

推导了测角后交点位方差与观测值的显函数关系式。

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In the case of small angular displacement, the natural frequency of the corresponding damping-free linear system is obtained, which is consistent with the experimental observation.

在小角位移的情形下，可近似得到相应的无阻尼线性系统的固有频率，它与观测结果吻合。

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