| 粗差检定的两种途径 |
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| 引用本文： | 刘根友,郝晓光,柳林涛.粗差检定的两种途径[J].大地测量与地球动力学,2005,25(3):29-33. |
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| 作者姓名： | 刘根友 郝晓光 柳林涛 |
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| 作者单位： | 中国科学院测量与地球物理研究所,武汉,430077;中国科学院测量与地球物理研究所,武汉,430077;中国科学院测量与地球物理研究所,武汉,430077 |
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| 基金项目： | 中国科学院重点实验室基金;中国科学院"百人计划";山东省重点实验室基金 |
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| 摘 要： | 给出了解决粗差问题的两种计算方案：①将粗差作为待估参数,采用拟稳平差思路解秩亏问题,直接获得粗差;②选取部分观测值作为准观测值,采用部分最小二乘法获得待估参数,将非准观测值的残差作为粗差。结果表明,两种方案与“拟准检定法”具有相同的效果,具有粗差的观测值在平差时不起作用。
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| 关 键 词： | 平差因子 粗差 准观测值 部分最小二乘法 拟准检定法 |
| 文章编号： | 1671-5942(2005)03-0029-05 |
| 修稿时间： | 2005年4月27日 |
TWO APPROACHES TO GROSS ERROR DETECTION |
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| LIU Genyou,Hao Xiaoguang,Liu Lintao.TWO APPROACHES TO GROSS ERROR DETECTION[J].Journal of Geodesy and Geodynamics,2005,25(3):29-33. |
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| Authors: | LIU Genyou Hao Xiaoguang Liu Lintao |
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| Abstract: | Two approaches to gross error detection are proposed in this paper. The first approach is that the gross errors (G) are treated as parameters to be estimated, and the idea of "Quasi-Stable adjustment" (G~T_rG_r=min)for solving rank deficient problem is adopted. The second approach is that part observations are selected as accurate observations, the principle of partial least-square estimation (V~T_rV_r=min) is used, and than the residuals of the other observations are treated as gross errors. The results by these two approaches are the same as by QUAD(Quasi Accurate Detection), and the observations with gross error no longer affects the adjustment. |
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| Keywords: | adjustment factor gross error quasi-accurate observation part least-square estimation QUAD(Quasi Accurate Detection) |
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