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GOCO06s – a satellite-only global gravity field model

机译：Goco06s - 仅卫星全球重力场模型

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GOCO06s is the latest satellite-only global gravity field model computed by the GOCO (Gravity Observation Combination) project. It is based on over a billion observations acquired over 15 years from 19 satellites with different complementary observation principles. This combination of different measurement techniques is key in providing consistently high accuracy and best possible spatial resolution of the Earth's gravity field. The motivation for the new release was the availability of reprocessed observation data for the Gravity Recovery and Climate Experiment (GRACE) and Gravity field and steady-state Ocean Circulation Explorer (GOCE), updated background models, and substantial improvements in the processing chains of the individual contributions. Due to the long observation period, the model consists not only of a static gravity field, but comprises additionally modeled temporal variations. These are represented by time-variable spherical harmonic coefficients, using a deterministic model for a regularized trend and annual oscillation. The main focus within the GOCO combination process is on the proper handling of the stochastic behavior of the input data. Appropriate noise modeling for the observations used results in realistic accuracy information for the derived gravity field solution. This accuracy information, represented by the full variance–covariance matrix, is extremely useful for further combination with, for example, terrestrial gravity data and is published together with the solution. The primary model data consisting of potential coefficients representing Earth's static gravity field, together with secular and annual variations, are available on the International Centre for Global Earth Models ( http://icgem.gfz-potsdam.de/ , last access: 11?June?2020). This data set is identified with the following DOI: https://doi.org/10.5880/ICGEM.2019.002 ( Kvas et?al. ,? 2019 b ) . Supplementary material consisting of the full variance–covariance matrix of the static potential coefficients and estimated co-seismic mass changes is available at https://ifg.tugraz.at/GOCO (last access: 11?June?2020).
机译：Goco06s是由Goco（重力观察组合）项目计算的最新卫星全局重力场模型。它基于超过19年从19颗卫星获得的20多亿人观察，具有不同的互补观察原则。不同测量技术的这种组合是提供始终如一的高精度和地球重力场的最佳空间分辨率的关键。新版本的动机是重力恢复和气候实验（GRATE）和重力场和稳态海洋循环探险员（GOCE），更新的背景模型以及加工链的大量改进个别贡献。由于观察期长，该模型不仅包括静态重力场，而且包括另外建模的时间变化。这些由时间可变球形谐波系数表示，使用确定性模型进行正则化趋势和年度振荡。 GOCO组合过程中的主要重点是在正确处理输入数据的随机行为。用于观察结果的适当噪声建模导致衍生的重力场解决方案的现实精度信息。由完全方差协方差矩阵表示的这种精度信息对于与例如地面重力数据的进一步组合非常有用，并且与解决方案一起发布。由代表地球静态重力场的潜在系数组成的主要模型数据以及世俗和年度变化，可在国际全球地球模型中心（http://iCem.gfz-potsdam.de/，最后一次访问：11？六月？2020）。使用以下DOI标识此数据集：https://doi.org/10.5880/ickem.2019.002（kvas et？al。，？2019 b）。 Https://ifg.Tugraz.at/goco（上次访问：11？6月？2020），可在HTTPS://ifg.Tugraz.at/Goco获得静态势系数的完全方差 - 协方差矩阵组成和估计的共震肿块变化。

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