| 用边长改正数求取测区平均高程异常 |
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| 引用本文： | 宋力杰,刘敏.用边长改正数求取测区平均高程异常[J].测绘学院学报,2005,22(1):14-16. |
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| 作者姓名： | 宋力杰 刘敏 |
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| 作者单位： | [1]信息工程大学测绘学院，河南郑州450052 [2]华北水利水电学院，河南郑州450008 |
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| 摘 要： | 边角网平差前须将观测值归算到椭球面上，归算离不开高程异常。文中推导了用边长的平差改正数计算测区平均高程异常改正数的公式，提出了精化平均高程异常改正数的迭代方法。此方法最大的优点是不需要天文、重力、空间等外部数据的支持，简单易行。不仅可以满足高程异常未知情况下观测值归算的需要，也可满足高程异常不精确情况下观测值归算的需要，通过迭代还可以提高边角网平差结果的精度。
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| 关 键 词： | 边角网 大地高 高程异常 距离归算 |
An Approach to the Height Anomaly in Synthetic Geodetic Network of Distance and Angle Measurements |
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| SONG Li-jie,LIU Min.An Approach to the Height Anomaly in Synthetic Geodetic Network of Distance and Angle Measurements[J].Journal of Institute of Surveying and Mapping,2005,22(1):14-16. |
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| Authors: | SONG Li-jie LIU Min |
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| Institution: | SONG Li-jie~1,LIU Min~2 |
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| Abstract: | A formula for average height anomaly correcting in measurement area calculated from residuals of the distances has been derived, and an iterative calculating method is proposed. This method is simple and practical in computation that does not need the support of astronomy, gravity or space measurements. It improves the accuracy of the positions by the adjustment of geodetic networks. |
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| Keywords: | angle and distance network geodetic height height anomaly distance reduction |
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