This paper describes an optimal estimating method for the celestial positioning and its accuracy.

论述了天文定位的最优估计方法及其精度。

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For correctly estimating a three-station locating system, it is significant to carefully analyze the influence of altitude on the accuracy of three-station locating system.

详细分析高度对三站定位系统定位精度的影响对于正确评价一三站时差定位系统具有极其现实的意义。

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In order to obtain an efficient extraction to mineral resources, a method with sufficient accuracy for estimating the grade and tonnage of ore reserve is required.

有效地开采矿物资源需要对赋存的品位及矿量有一准确的估计。

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