Global Modeling and Assimilation Office
NASA Goddard Space Flight Center
Last Updated: Feb 9 2015
Title: Assimilation of Precipitation Measurement Missions microwave radiance observations with GEOS-5
Author: Jianjun Jin (NASA/GMAO)
Min-Jeong Kim (NASA/GMAO)
Will McCarty (NASA/GMAO)
Santha Akella (NASA/GMAO)
Wei Gu (NASA/GMAO)
The Global Precipitation Mission (GPM) Core Observatory satellite was launched in February, 2014. The GPM Microwave Imager (GMI) is a conically scanning radiometer measuring 13 channels ranging from 10 to 183 GHz and sampling between 65° S – 65° N. This instrument is a successor to the Tropical Rainfall Measurement Mission (TRMM) Microwave Imager (TMI), which has observed 9 channels at frequencies ranging 10 to 85 GHz between 40° S – 40° N since 1997. The Global Modeling and Assimilation Office (GMAO) is developing an all-sky assimilation methodology to incorporate these GMI and TMI radiance data into its Goddard Earth Observation System model, version 5 (GEOS-5) atmospheric analysis. This method aims to extract information regarding clouds, precipitation, and sea surface temperature from these observations. This presentation will outline the base procedures developed to first assimilate GMI and TMI radiances in clear-sky conditions, including quality control methods, thinning decisions, and the estimation of, observation errors. Experiments will then assess the impact these observations have when incorporated into the GEOS-5 atmospheric data assimilation system.
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Global Modeling and Assimilation Office NASA Goddard Space Flight Center |
Last Updated: Feb 9 2015 |