J. Kostelecký, J. Klokočník, Blazej Bucha, A. Bezděk, C. Förste
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引用次数: 17
摘要
EIGEN-6C4组合重力场模型(Forste et al.， 2014)是波茨坦GFZ和图卢兹GRGS最新的全球组合重力场模型。EIGEN-6C4已生成，包括整个GOCE任务(2009年11月至2013年10月)的卫星重力梯度数据，最大球面度，阶数为2190。在本研究中，通过重力扰动和扰动势二阶导数的Marussi张量的tzz部分，比较了EIGEN-6C4与EGM2008的最大度和阶数。重点介绍了EIGEN-6C4的GOCE数据(还原后的完整梯度测量数据)对重力场描述有明显改善作用的区域。GNSS/水准面高度是评估重力场模型的独立数据源。因此，我们使用欧洲、捷克共和国和斯洛伐克境内的GNSS/水准数据集对EIGEN-6C4 w.r.t. EGM2008进行评估。
Evaluation of gravity field model EIGEN-6C4 by means of various functions of gravity potential, and by GNSS/levelling
The combined gravity field model EIGEN-6C4 (Forste et al., 2014) is the latest combined global gravity field model of GFZ Potsdam and GRGS Toulouse. EIGEN-6C4 has been generated including the satellite gravity gradiometry data of the entire GOCE mission (November 2009 till October 2013) and is of maximum spherical degree and order 2190. In this study EIGEN-6C4 has been compared with EGM2008 to its maximum degree and order via gravity disturbances and T zz part of the Marussi tensor of the second derivatives of the disturbing potential. The emphasis is put on such areas where GOCE data (complete set of gradiometry measurements after reductions) in EIGEN-6C4 obviously contributes to an improvement of the gravity field description. GNSS/levelling geoid heights are independent data source for the evaluation of gravity field models. Therefore, we use the GNSS/levelling data sets over the territories of Europe, Czech Republic and Slovakia for the evaluation of EIGEN-6C4 w.r.t. EGM2008.
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