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Proceedings Paper

Improvement of the use of MSG and GOES data in the NCEP GDAS
Author(s): Tong Zhu; Fuzhong Weng; Haixia Liu; John Derber
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Paper Abstract

Infrared (IR) observations from Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board Meteosat Second Generation (MSG)-2 satellite are assimilated into NCEP global data assimilation system (GDAS). The assimilation of current Geostationary Operational Environmental Satellite (GOES) Imager data was also reinvestigated. The Community Radiative Transfer Model (CRTM) was used as observation operator for the assimilation of SEVIRI radiance observations. The CRTM was enhanced with several critical components for IR radiance assimilation, such as a dynamically-updated land surface emissivity data, as well as fast and accurate gaseous absorption modules. The Global Space-Based Inter-Calibration System (GSICS) calibration corrections were applied to improve the simulation of SEVIRI and GOES Imager radiances. Preliminary results show that inclusions of the SEVIRI radiances at water vapor channels (6.25 and 7.35 micron) and CO2 channel (13.4 micron) in Global Forecast System (GFS) produced significant positive impacts on the six-day forecasts. Assimilation of other five SEVIRI IR window channels in GFS reduces the positive impact. By applying GSICS calibration algorithm to correct SEVIRI and GOES-12 Imager observations biases, the impacts on GFS forecast were improved. Further studies are being carried out to improve the effective assimilation of SEVIRI IR window channels radiances.

Paper Details

Date Published: 12 August 2010
PDF: 6 pages
Proc. SPIE 7811, Atmospheric and Environmental Remote Sensing Data Processing and Utilization VI: Readiness for GEOSS IV, 781103 (12 August 2010); doi: 10.1117/12.860090
Show Author Affiliations
Tong Zhu, CIRA/Colorado State Univ. (United States)
NOAA/NESDIS/STAR (United States)
Fuzhong Weng, NOAA/NESDIS/STAR (United States)
Haixia Liu, Science Applications International Corp. (United States)
John Derber, NOAA/NCEP/EMC (United States)

Published in SPIE Proceedings Vol. 7811:
Atmospheric and Environmental Remote Sensing Data Processing and Utilization VI: Readiness for GEOSS IV
Mitchell D. Goldberg; Hal J. Bloom, Editor(s)

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