EIGEN-6C4 The latest combined global gravity field model including GOCE data up to degree and order 2190 of GFZ Potsdam and GRGS Toulouse

EIGEN-6C4 is a static global combined gravity field model up to degree and order 2190.
It has been elaborated jointly by GFZ Potsdam and GRGS Toulouse.
The combination of the different satellite and surface data sets has been
done by a band-limited combination of normale equations (to max degree 370),
which are gererated from observation equations for the spherical harmonic
coefficients. A brief description of the applied techniques for the generation
of such a combined gravity field model is given in Shako et al. 2014. The
resulted solution to degree/order 370 has been extended to degree/order 2190 by
a block diagonal solution using the DTU10 global gravity anomaly data grid.

EIGEN-6C4 是一款最高阶次为2190的静态全球联合重力场模型。
该模型由德国波茨坦地球科学研究中心（GFZ Potsdam）与法国图卢兹空间大地测量研究组（GRGS Toulouse）联合研发。
针对不同卫星与地面观测数据集的联合处理，采用限带法方程组合法完成（最大阶次为370），此类法方程由球谐系数观测方程生成。
关于此类联合重力场模型构建所用技术的简要说明，可参阅Shako等2014年的研究文献。
最终得到的370阶解算结果，借助DTU10（DTU10）全球重力异常数据网格，通过分块对角解算方法扩展至2190阶。

搜集汇总

背景与挑战

背景概述

EIGEN-6C4是一个由GFZ Potsdam和GRGS Toulouse联合开发的静态全球重力场模型，最高达到2190阶/次。该模型结合了卫星和地面数据，通过带限法组合正规方程生成，并利用DTU10全球重力异常数据网格扩展到更高阶次。