The analysis of hydrometeor sensitivity on TRMM/TMI

Nan Ching Yeh, Wann Jin Chen, Chih Hsien Wei, Chian Yi Liu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) is very sensitive to hydrometeor, including liquid and solid water in various forms such as rain, ice, snow, and graupel. The purpose of this paper is to analyze the influence of hydrometeor on TMI channels by using Weather Research and Forecasting model (WRF) output to reconstruct the atmospheric state, cloud information and simulated brightness temperature (TB) from Radiative Transfer Model (RTM) calculation. The result shows that the rain may affect on 19 GHz TB of TMI, while the graupel has the most important factor influencing on 85 GHz. The ice and snow does not show a significant effect on any channel of TMI. Because the graupel is typically found in the strong convective clouds, such clouds will lead to heavy rainfalls rate. Therefore, 85 GHz channel is suggested for estimating heavy rainfall rate.

Original languageEnglish
Pages (from-to)203-208
Number of pages6
JournalJournal of Aeronautics, Astronautics and Aviation
Issue number3
StatePublished - 1 Sep 2014


  • Hydrometeor
  • Radiative transfer model
  • Weather research and forecasting


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