Combination Service for Time-variable Gravity Fields (COST-G): operational GRACE-FO combination and validation of Chinese GRACE time-series
- 1University of Bern, Astronomical Institute, Bern, Switzerland (ulrich.meyer@aiub.unibe.ch)
- 2GFZ German Research Centre for Geosciences, Germany
- 3Graz University of Technology, Austria
- 4Centre National d’Etudes Spatiales, France
- 5Leibniz University Hannover, Germany
- 6Stellar Space Studies, France
- 7Institute of planetary geodesy, Technical University of Dresden, Germany
- 8HafenCity University Hamburg, Germany
- 10Institute of Geophysics, School of Physics, Huazhong University of Science and Technology, China
- 11Department of Earth and Space Sciences, Southern University of Science and Technology, China
- 12College of Surveying and Geo-informatics, Tongji University, Shanghai, China
- 13GNSS Research Center, Wuhan University, China
- 14Institute of Geodesy and Geophysics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, China
- 15School of Geospatial Engineering and Science, Sun Yat-sen University, China
- *A full list of authors appears at the end of the abstract
The Combination Service for Time-variable Gravity Fields (COST-G) of the International Association of Geodesy (IAG) provides combined monthly gravity fields of its associated and partner Analysis Centers (ACs). In November 2020, the combination of monthly GRACE-FO gravity fields started its operational mode, providing consolidated L2 (spherical harmonics) and L3 (gridded and post- processed) products with a latency of currently 3 months. We present an overview and quality assessment of the available products.
COST-G aims at the extension of its service to include further GRACE and GRACE-FO analysis centers. In January 2020 a collaboration with representatives of five Chinese ACs was initiated, who provided GRACE time-series according to the COST-G requirements. We present the results of a test combination with the Chinese AC models, including comparison and quality assessment of all contributing time-series and validation of the combined gravity fields.
Ulrich Meyer, Martin Lasser, Adrian Jäggi: University of Bern, Astronomical Institute, Bern, Switzerland; Frank Flechtner, Christoph Dahle, Christoph Förste: GFZ German Research Centre for Geosciences, Germany; Torsten Mayer- Gürr, Andreas Kvas, Saniya Behzadpour: Graz University of Technology, Austria; Jean-Michel Lemoine: Centre National d’Etudes Spatiales, France; Igor Koch, Jakob Flury: Leibniz University Hannover, Germany; Stéphane Bourgogne: Stellar Space Studies, France; Andreas Groh: Institute of planetary geodesy, Technical University of Dresden, Germany; Annette Eicker: HafenCity University Hamburg, Germany; Benoit Meyssignac: Laboratoire d’Etudes en Geophysique et Oceanographie Spatiales, France; Hao Zhou, Zhicai Luo: Institute of Geophysics, School of Physics, Huazhong University of Science and Technology, China; Zhengwen Yan, Jiangjun Ran: Department of Earth and Space Sciences, Southern University of Science and Technology, China; Qiujie Chen, Yunzhong Shen: College of Surveying and Geo-informatics, Tongji University, Shanghai, China; Xiang Guo, Qile Zhao: GNSS Research Center, Wuhan University, China; Changqing Wang, Min Zhong: Institute of Geodesy and Geophysics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, China; Wei Feng: Institute of Geodesy and Geophysics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, and China School of Geospatial Engineering and Science, Sun Yat-sen University, China
How to cite: Meyer, U., Lasser, M., Jäggi, A., Dahle, C., Flechtner, F., Kvas, A., Behzadpour, S., Mayer-Gürr, T., Lemoine, J.-M., Koch, I., Flury, J., Bourgogne, S., Groh, A., Eicker, A., Förste, C., Luo, Z., Ran, J., Shen, Y., Zhao, Q., and Feng, W. and the COST-G Team: Combination Service for Time-variable Gravity Fields (COST-G): operational GRACE-FO combination and validation of Chinese GRACE time-series, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-2416, https://doi.org/10.5194/egusphere-egu21-2416, 2021.
