Details
| Original language | English |
|---|---|
| Title of host publication | Beyond 100 |
| Subtitle of host publication | The Next Century in Geodesy - Proceedings of the IAG General Assembly, 2019 |
| Editors | Jeffrey T. Freymueller, Laura Sánchez |
| Publisher | Springer Science and Business Media Deutschland GmbH |
| Pages | 57-65 |
| Number of pages | 9 |
| ISBN (electronic) | 978-3-031-09857-4 |
| ISBN (print) | 9783031098567 |
| Publication status | Published - 2023 |
| Event | 27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019 - Montreal, Canada Duration: 8 Jul 2019 → 18 Jul 2019 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 152 |
| ISSN (Print) | 0939-9585 |
| ISSN (electronic) | 2197-9359 |
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.
Keywords
- Combined solutions, COST-G, IGFS Product Center, Time variable gravity
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
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Beyond 100: The Next Century in Geodesy - Proceedings of the IAG General Assembly, 2019. ed. / Jeffrey T. Freymueller; Laura Sánchez. Springer Science and Business Media Deutschland GmbH, 2023. p. 57-65 (International Association of Geodesy Symposia; Vol. 152).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - International Combination Service for Time-Variable Gravity Fields (COST-G)
T2 - 27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019
AU - Jäggi, Adrian
AU - Meyer, Ulrich
AU - Lasser, Martin
AU - Jenny, Barbara
AU - Lopez, Teodolina
AU - Flechtner, Frank
AU - Dahle, Christoph
AU - Förste, Christoph
AU - Mayer-Gürr, Torsten
AU - Kvas, Andreas
AU - Lemoine, Jean Michel
AU - Bourgogne, Stéphane
AU - Weigelt, Matthias
AU - Groh, Andreas
N1 - 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.
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
KW - Combined solutions
KW - COST-G
KW - IGFS Product Center
KW - Time variable gravity
UR - http://www.scopus.com/inward/record.url?scp=85142620346&partnerID=8YFLogxK
U2 - 10.1007/1345_2020_109
DO - 10.1007/1345_2020_109
M3 - Conference contribution
AN - SCOPUS:85142620346
SN - 9783031098567
T3 - International Association of Geodesy Symposia
SP - 57
EP - 65
BT - Beyond 100
A2 - Freymueller, Jeffrey T.
A2 - Sánchez, Laura
PB - Springer Science and Business Media Deutschland GmbH
Y2 - 8 July 2019 through 18 July 2019
ER -