| 论三角测量单位权方差的先验估计与后验估计 |
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| 引用本文： | 覃辉.论三角测量单位权方差的先验估计与后验估计[J].四川测绘,1994(1). |
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| 作者姓名： | 覃辉 |
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| 作者单位： | 中南工业大学 |
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| 摘 要： | 三角洲量单位权方差的先验估值一般用经典菲列罗公式计算。实践中，经常出现三角测量单位权方差的先验估值不等于后验估值的情形．本文根据条件平差的原理，证明了单位权方基的先验估值是有偏估计，经典菲列罗公式是后验估计公式的特殊形式，并推导出了广义菲列罗公式。
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| 关 键 词： | 三角网 单位权方差 后验估计 菲列罗公式 |
DISCUSSION OF A PRIOR AND A POSTERIOR ESTIMATE OF UNIT WEIGHT VARIANCE FOR TRIANGULATION |
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| Qin Hui.DISCUSSION OF A PRIOR AND A POSTERIOR ESTIMATE OF UNIT WEIGHT VARIANCE FOR TRIANGULATION[J].Surveying and Mapping of Sichuan,1994(1). |
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| Authors: | Qin Hui |
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| Institution: | Central South University of Technology |
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| Abstract: | A prior estimate of unit weight variance is usually calculated by the classicalFerrelo's formula. In practice of survey, the case that a prior estimate of it is'nt equalto a peterior one appears frequently. Based on the principle of condition adjustment ,thispaper proves that a prior estimate of it is biased and the classical Fetrelo's formula is aspecial case of posterior estimate formule of it, A expanded Ferrelo's formula is derived. |
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| Keywords: | triangulation network variance of unit weight prior estimate posterior estimate Ferrelo's formula |
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