Precipitation Retrievals in typhoon domain combining of FY3C MWHTS Observations and WRF Predicted Models

[摘要] A passive sub-millimeter precipitation retrievals algorithm is provided based on Microwave Humidity and Temperature Sounder (MWHTS) onboard the Chinese Feng Yun 3C (FY-3C) satellite. Using the validated global reference physical model NCEP/WRF/VDISORT), NCEP data per 6 hours are downloaded to run the Weather Research and Forecast model WRF, and derive the typical precipitation data from the whole world. The precipitation retrieval algorithm can operate either on land or on seawater for global. To simply the calculation procedure and save the training time, principle component analysis (PCA) was adapted to filter out the redundancy caused by scanning angle and surface effects, as well as system noise. According to the comparison and validation combing with other precipitation sources, it is demonstrated that the retrievals are reliable for surface precipitation rate higher than 0.1 mm/h at 15km resolution.

[发布机构] Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China^1;University of Chinese Academy of Sciences, Beijing; 100190, China^2

[效力级别] 政治学

[关键词] 118.75GHz;FY3C;Humidity and temperatures;MWHTS;Precipitation retrievals;Principle component analysis;Surface precipitation;Weather Research and Forecast models