Assimilation of early FORMOSAT-7/COSMIC-2 GNSS radio occultation data with the global NWP system at Central Weather Bureau (CWB)
Abstract
The FORMOSAT-7/COSMIC-2 satellites have been launched on June 25, 2019. It is a successor of the successful FORMOSAT-3/COSMIC mission and is expected to provide better deep tropical tropospheric moisture data compared to FORMOSAT-3/COSMIC. As a member of the project, Taiwan's Central Weather Bureau (CWB) has received early internal release of the FORMOSAT-7/COSMIC-2 GNSS radio occultation (GNSS-RO) data from Taiwan Analysis Center for COSMIC (TACC), starting from July 16, 2019. To evaluate the impact of the FORMOSAT-7/COSMIC-2 data for global numerical weather prediction (NWP), a parallel experiment assimilating the FORMOSAT-7/COSMIC-2 data in addition to the operational data stream is conducted with the global NWP system at CWB. We will show the results from this parallel experiment by the time of the presentation, including the impact to global forecast skills, observation minus background/analysis statistics, observation error diagnosis, and ensemble forecast sensitivity to observation (EFSO) diagnosis for the FORMOSAT-7/COSMIC-2 data. We expect that such information will be useful for the final public release of the FORMOSAT-7/COSMIC-2 data.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.G21B0727L
- Keywords:
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- 3307 Boundary layer processes;
- ATMOSPHERIC PROCESSES;
- 1220 Atmosphere monitoring with geodetic techniques;
- GEODESY AND GRAVITY;
- 1294 Instruments and techniques;
- GEODESY AND GRAVITY;
- 1866 Soil moisture;
- HYDROLOGY