采用弱基准和抗差估计的重力网平差  

Adjustment of gravity network using faint datum and robust estimation

作　　者：赵德军 张敏利 王强 陈永祥 

机构地区：[1]西安测绘总站,陕西西安710054 [2]大地测量与地球动力学国家重点实验室,湖北武汉430077

出　　处：《测绘工程》2015年第1期25-27,32,共4页Engineering of Surveying and Mapping

基　　金：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)

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。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/s^2,and random errors satisfy normal distribution.

关 键 词：重力网 绝对重力 相对重力 弱基准 抗差估计 

分 类 号：P223[天文地球—大地测量学与测量工程]