COST-G: towards a new GRACE and GRACE-FO combination
- 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 Geodesy and Geophysics, Chinese Academy of Sciences, China
- 8Institute of Geodesy and Photogrammetry, ETH Zürich, Switzerland
The combination service for time-variable gravity fields (COST-G) provides the full time-series of monthly GRACE gravity fields: COST-G GRACE RL01, combined in reprocessing mode, and a steadily growing time-series of monthly GRACE-FO gravity fields: COST-G GRACE-FO RL01 OP, combined on an operational basis. Both time-series are currently considered for re-combination. In case of GRACE, new high-quality time-series from Chinese analysis centers are available for combination. In case of GRACE-FO, a revision of the weighting scheme, developed in the frame of the Horizon2020 project Global Gravity-based Groundwater Product (G3P), and the availability of reprocessed GRACE-FO time-series from AIUB, CSR, GFZ, and JPL, lead to a significant improvement of the combined gravity fields.
We present the preliminary re-combined GRACE and GRACE-FO time-series and quantify the differences with respect to the COST-G RL01 series in terms of signal and noise content.
How to cite: Meyer, U., Lasser, M., Darbeheshti, N., Jäggi, A., Flechtner, F., Dahle, C., Förste, C., Güntner, A., Mayer-Gürr, T., Kvas, A., Behzadpour, S., Lemoine, J.-M., Koch, I., Flury, J., Bourgogne, S., and Feng, W.: COST-G: towards a new GRACE and GRACE-FO combination, GRACE/GRACE-FO Science Team Meeting 2022, Potsdam, Germany, 18–20 Oct 2022, GSTM2022-75, https://doi.org/10.5194/gstm2022-75, 2022.
