| Helmert方差分量估计在跨河水准测量中的应用 |
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| 引用本文： | 范百兴,李广云.Helmert方差分量估计在跨河水准测量中的应用[J].测绘学院学报,2004,21(1):27-29. |
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| 作者姓名： | 范百兴 李广云 |
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| 作者单位： | 信息工程大学测绘学院 河南郑州450052
(范百兴)，信息工程大学测绘学院 河南郑州450052(李广云) |
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| 摘 要： | 采用测距三角高程法进行跨河水准测量，可以不量取仪器高，但观测值中有两类不同的观测量。利用Helmert方差分量估计，通过若干次迭代计算，可以更准确地确定两类观测值权的关系，提高了跨河水准测量的平差精度。
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| 关 键 词： | 跨河水准 Helmert方差分量估计 测距三角高程 |
Applying Helmert-WF Variance Component Estimation to River-Crossing Leveling |
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| FAN Bai xing,LI Guang yun.Applying Helmert-WF Variance Component Estimation to River-Crossing Leveling[J].Journal of Institute of Surveying and Mapping,2004,21(1):27-29. |
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| Authors: | FAN Bai xing LI Guang yun |
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| Abstract: | When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values. If we use Helmert WF variance component estimation and iterating several times, accurate connection between the two types of observed values is able to be found so that precision of adjusted value will be improved. |
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| Keywords: | river crossing leveling Helmert WF variance component estimation trigonometric leveling with distance measurement |
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