International Combination Service for Time-Variable Gravity Fields (COST-G)

Start of Operational Phase and Future Perspectives

authored by: Adrian Jäggi, Ulrich Meyer, Martin Lasser, Barbara Jenny, Teodolina Lopez, Frank Flechtner, Christoph Dahle, Christoph Förste, Torsten Mayer-Gürr, Andreas Kvas, Jean Michel Lemoine, Stéphane Bourgogne, Matthias Weigelt, Andreas Groh
Abstract: The International Combination Service for Time-variable Gravity Fields (COST-G) is a new Product Center of IAG’s International Gravity Field Service (IGFS). COST-G provides consolidated monthly global gravity fields in terms of spherical harmonic coefficients and thereof derived grids of surface mass changes by combining existing solutions or normal equations from COST-G analysis centers (ACs) and partner analysis centers (PCs). The COST-G ACs adopt different analysis methods but apply agreed-upon consistent processing standards to deliver time-variable gravity field models, e.g. from GRACE/GRACE-FO low-low satellite-to-satellite tracking (ll-SST), GPS high-low satellite-to-satellite tracking (hl-SST) and Satellite Laser Ranging (SLR). The organizational structure of COST-G and results from the first release of combined monthly GRACE solutions covering the entire GRACE time period are discussed in this article. It is shown that by combining solutions and normal equations from different sources COST-G is taking advantage of the statistical properties of the various solutions, which results in a reduced noise level compared to the individual input solutions.
Organisation(s): Institute of Geodesy
External Organisation(s): University of Bern
Helmholtz Centre Potsdam - German Research Centre for Geosciences (GFZ)
Graz University of Technology
Centre national d’études spatiales (CNES)
Esplanade Compans Caffarelli
Technische Universität Dresden
Type: Conference contribution
Pages: 57-65
No. of pages: 9
Publication date: 2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Computers in Earth Sciences, Geophysics
Electronic version(s): https://doi.org/10.1007/1345_2020_109 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{7a589da80943453883ec8f3b7742f36a,
title = "International Combination Service for Time-Variable Gravity Fields (COST-G): Start of Operational Phase and Future Perspectives",
abstract = "The International Combination Service for Time-variable Gravity Fields (COST-G) is a new Product Center of IAG{\textquoteright}s International Gravity Field Service (IGFS). COST-G provides consolidated monthly global gravity fields in terms of spherical harmonic coefficients and thereof derived grids of surface mass changes by combining existing solutions or normal equations from COST-G analysis centers (ACs) and partner analysis centers (PCs). The COST-G ACs adopt different analysis methods but apply agreed-upon consistent processing standards to deliver time-variable gravity field models, e.g. from GRACE/GRACE-FO low-low satellite-to-satellite tracking (ll-SST), GPS high-low satellite-to-satellite tracking (hl-SST) and Satellite Laser Ranging (SLR). The organizational structure of COST-G and results from the first release of combined monthly GRACE solutions covering the entire GRACE time period are discussed in this article. It is shown that by combining solutions and normal equations from different sources COST-G is taking advantage of the statistical properties of the various solutions, which results in a reduced noise level compared to the individual input solutions.",
keywords = "Combined solutions, COST-G, IGFS Product Center, Time variable gravity",
author = "Adrian J{\"a}ggi and Ulrich Meyer and Martin Lasser and Barbara Jenny and Teodolina Lopez and Frank Flechtner and Christoph Dahle and Christoph F{\"o}rste and Torsten Mayer-G{\"u}rr and Andreas Kvas and Lemoine, {Jean Michel} and St{\'e}phane Bourgogne and Matthias Weigelt and Andreas Groh",
note = "Funding Information: This article is dedicated to Richard Biancale, who unexpectedly passed away on February 4, 2019. His support and promotion of the activities described in this article are gratefully acknowledged. The study was performed in the framework of an international team, led by Richard Biancale and the first author of this article, that is receiving support from the International Space Science Institute (ISSI) in Bern, Switzerland. ; 27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019 ; Conference date: 08-07-2019 Through 18-07-2019",
year = "2023",
doi = "10.1007/1345_2020_109",
language = "English",
isbn = "9783031098567",
series = "International Association of Geodesy Symposia",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "57--65",
editor = "Freymueller, {Jeffrey T.} and Laura S{\'a}nchez",
booktitle = "Beyond 100",
address = "Germany",
}