| 采用弱基准和抗差估计的重力网平差 |
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| 引用本文： | 赵德军,张敏利,王强,陈永祥.采用弱基准和抗差估计的重力网平差[J].测绘工程,2015(1):25-27,32. |
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| 作者姓名： | 赵德军 张敏利 王强 陈永祥 |
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| 作者单位： | 1. 西安测绘总站,陕西 西安,710054;2. 西安测绘总站，陕西 西安 710054; 大地测量与地球动力学国家重点实验室，湖北 武汉 430077 |
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| 基金项目： | 国家自然科学基金资助项目(41104047);大地测量与地球动力学重点实验室开放基金资助项目(SKLGED2013-4-5-E) |
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| 摘 要： | 以沿海某测区绝对重力和相对重力网数据处理为例,详细描述了弱基准重力网平差的方法,绝对重力和相对重力先验权的确定,用抗差等价权来调整相对重力的权、重力仪参数的取舍。结果表明,弱基准能有效地提高整网的精度;抗差估计能有效地探测并降低异常数据的权。重力点平均中误差为13.6×10-8 ms-2,偶然误差检验符合正态分布。
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| 关 键 词： | 重力网 绝对重力 相对重力 弱基准 抗差估计 |
Adjustment of gravity network using faint datum and robust estimation |
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| ZHAO De-jun;ZHANG Min-li;WANG Qiang;CHEN Yong-xiang.Adjustment of gravity network using faint datum and robust estimation[J].Engineering of Surveying and Mapping,2015(1):25-27,32. |
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| Authors: | ZHAO De-jun;ZHANG Min-li;WANG Qiang;CHEN Yong-xiang |
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| Institution: | ZHAO De-jun;ZHANG Min-li;WANG Qiang;CHEN Yong-xiang;Xi’an Division of Surveying and Mapping;State Key Laboratory of Geodesy and Earth’s Dynamics; |
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| Abstract: | A method of solving a synthetic adjustment of absolute and relative gravity network using faint datum , the determination of the weights about absolute and relative gravity measurements , robust estimation weights ,the choice of relative gravimeter's parameters are described in details ,respectively . Some computing results show that , the accuracy of gravity network can be enhanced by faint datum adjustment ,and robust estimation can reduce anomalous data's weights , of which the average error estimate of the unknown gravity values is ± 13 .6 × 10-8 m/s2 , and random errors satisfy normal distribution . |
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| Keywords: | gravity network absolute gravity relative gravity faint datum robust estimation |
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