多个超高阶重力场模型精度分析

发布时间：2018-01-16 07:30

本文关键词：多个超高阶重力场模型精度分析　出处：《测绘科学技术学报》2017年04期 　论文类型：期刊论文

【摘要】：分析了国际和国内公布的EGM2008、GECO、Eigen6c4、UGM2005、DQM2000d和DQM2006等超高阶重力场模型的内符合精度;利用中国境内的实测GPS/水准数据对各类模型进行了外符合精度检验;结合不同的方法对系统差进行了处理;最后基于试验区数据讨论了不同模型之间频谱组合方法对高程异常计算结果的改善情况。实验表明,Eigen-6C4模型具有更高的内符合精度,国内公布的UGM2005和DQM2006两种模型精度相当;本文提出的十参数法相比于传统四参数方法精度获得了4.6%~22.20%的提升;GECO模型和Eigen-6C4模型在实验区内外符合精度较好;不同模型之间的频谱组合可以在一定程度上提高试验区内模型确定高程异常的精度。
[Abstract]:The international and domestic publication of EGM2008 / Eigen6c4 / UGM2005 was analyzed. The internal coincidence accuracy of the ultra-high order gravity field models such as DQM2000d and DQM2006; Based on the measured GPS / leveling data in China, the external coincidence accuracy of all kinds of models is tested. Combined with different methods to deal with the system difference; Finally, based on the data of the experimental area, the paper discusses the improvement of the calculation result of the height anomaly by using the spectrum combination method between different models. The experiment shows that the Eigen-6C4 model has a higher accuracy of internal coincidence. The UGM2005 and DQM2006 models published in China have the same accuracy. Compared with the traditional four-parameter method, the 10-parameter method presented in this paper has achieved an improvement of 4.60.20% in accuracy compared with the traditional four-parameter method. The accuracy of GECO model and Eigen-6C4 model is good in the experimental area. The spectral combination between different models can improve the accuracy of the model to determine the height anomaly in the experimental area to a certain extent.
【作者单位】：信息工程大学;
【基金】：国家973计划项目(6132220202) 国家自然科学基金项目(41774018)
【分类号】：P223
【正文快照】： 高精度、高分辨率的地球重力场模型在物理大地测量领域中的作用日益凸显。随着卫星技术的快速发展,其精度和分辨率发生了质的飞跃,GRACE、CHAMP和GOCE等重力卫星计划的先后成功实施使得全球重力场模型的中低阶精度提高了约两个量级或更高[1-2]。现阶段主要的超高阶模型见表1。

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