简要介绍了EGM2008地球重力场模型，利用分布于我国东部平原地区，中部丘陵地带和西部高原山区的4个测量项目的数据，对EGM2008地球重力场模型的精度进行了分析，并对该模型在不同地形条件下的应用方法进行了探索。

全球重力场模型下载 EGM2008.gfc重力场模型数据下载

XGM2019e is a combined global gravity field model represented through spheroidal harmonics up to d/o 5399, corresponding to a spatial resolution of 2’ (~4 km). As data sources it includes the satellite model GOCO06s in the longer wavelength area combined with terrestrial measurements for the shorter wavelengths. The terrestrial data itself consists over land and ocean of gravity anomalies provided by courtesy of NGA (identical to XGM2016, having a resolution of 15’) augmented with topographically derived gravity over land (EARTH2014). Over the oceans, gravity anomalies derived from satellite altimetry are used (DTU13, in consistency with the NGA dataset). The combination of the satellite data with the terrestrial observations is performed by using full normal equations up to d/o 719 (15’). Beyond d/o 719, a block-diagonal least-squares solution is calculated for the high-resolution terrestrial data (from topography and altimetry). All calculations are performed in the spheroidal harmonic domain. In the spectral band up to d/o 719 the new model shows over land a slightly improved behavior over preceding models such as XGM2016, EIGEN6c4 or EGM2008 when comparing it to independent GPS leveling data. Over land and in the spectral range above d/o 719 the accuracy of XGM2019e slightly suffers from the sole use oftopographic forward modelling; Hence, errors are increased in well-surveyed areas compared to models containing real gravity data, e.g. EIGEN6c4 or EGM2008. However, the performance of XGM2019e can be considered as globally more homogeneous and independent from existing high resolution global models. Over the oceans the model exhibits an improved performance throughout the complete spectrum (equal or better than preceding models).

重力场模型 matlab 详细文件 有解释 很好懂 EGC12008的数据

根据积分方程法反演地球重力场的数学模型，利用GOCE卫星2009-11-02~2010-01-02共61d的精密轨道数据反演了几组地球重力场模型。结果表明，GOCE卫星轨道能有效提取地球重力场的长波信息，弥补了GOCE卫星重力梯度带宽的限制，在106阶次的大地水准面误差为±9．6cm，该阶次精度优于EIGENCHAMP03S及GRACE卫星两个月轨道反演地球重力场的精度，但由于两极空白，反演的带谐位系数精度偏低。联合GOCE及GRACE卫星轨道反演的模型在106阶次的大地水准面误差为士6．9cm，弥补丁G

根据重力场模型文件计算重力异常，大地水准面高，以及垂线偏差。

GIS格式的EGM96重力场模型，用于高程的拟合！

在GPS计算软件中加载此模型可以计算点位的正常高

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对于重力场模型很好的资料，介绍了几乎所有的重力场模型以及最新的重力场模型