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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting
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GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting

机译：Goco05c：基于全正常方程的新的重力场模型和区域变化加权

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摘要

GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS-levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.
机译：Goco05c是一种重力场模型，被计算为卫星模型的组合解决方案和全球重力异常的全局数据集。它被解决到程度和订单720.它是第一个应用区域变化加权的模型。由于这导致所有重力场参数之间的相关性强烈相关，因此通过施加高性能计算，必须严格地解决所得到的具有2 TB的完整正常方程系统。 GOCO05C是第一组合的重力场模型，独立于EGM2008，其中包含整个任务期的衰减数据。 GOCO05C的性能由GNSS调整比较，轨道测试和平均动态地形的计算外部验证，至少实现现有高分辨率模型的质量。结果表明，额外的衰减信息在不充分观察到的区域中是高度有益的，并且由于各个数据的加权方案，模型的光谱和空间一致性显着提高。由于在特定区域中使用填充数据，该模型不能用于这些地区的物理解释。

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