| EIGEN-GL04C重力场模型的精度分析 |
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| 引用本文： | 梁勇,孙新宇,周茜.EIGEN-GL04C重力场模型的精度分析[J].北京测绘,2010(2):24-26. |
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| 作者姓名： | 梁勇 孙新宇 周茜 |
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| 作者单位： | 济南市勘察测绘研究院,山东济南,250013;济南市国土资源局,山东济南,250013 |
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| 摘 要： | 本文对GFZ发布的GRACE EIGEN-GL04C重力场模型从球谐系数分析、误差阶方差分析两方面进行了精度评价。研究表明,相较于以往的重力场模型,EIGEN-GL04C重力场模型精度对120阶以下(未包含J2项)的地球中长波部分具有明显的改善。GRACE重力卫星测量已经成为获取地球重力场信息的重要手段。
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| 关 键 词： | 重力场模型 GRACE EIGEN-GL04C 误差阶方差 球谐系数分析 |
Precision Analysis of EIGEN-GL04C Gravity Model |
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| LIANG Yong,SUN Xin-yu,ZHOU Qian.Precision Analysis of EIGEN-GL04C Gravity Model[J].Beijing Surveying and Mapping,2010(2):24-26. |
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| Authors: | LIANG Yong SUN Xin-yu ZHOU Qian |
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| Institution: | LIANG Yong1,SUN Xin-yu2,ZHOU Qian2(1.Jinan Institute of Surveying and Mapping,Jinan,Shandong,250013,China,2.Jinan City Land Resources Bureau of Shandong,China) |
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| Abstract: | In this paper,the precisions of EIGEN-GL04C gravity model derived from GRACE satellite gravity mission are analyzed from sphere harmonic coefficient analysis and error degree variance analysis.The results indicate that,compared to previous Earth's gravity models,the precisions of EIGEN-GL04C gravity models are better below 120 degree(without J2).And,GRACE satellite gravity mission has been playing an important role in obtaining the information of Earth's gravity field. |
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| Keywords: | GRACE EIGEN-GL04C |
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