Satellite data assimilation pre-processing plays a crucial role in bridging satellite data pre-processing and numerical weather prediction model assimilation.It involves integrating pre-processed satellite meas-urements,orbital splicing and sparsification of satellite data,the fusion of boundary condition parameters under satellite pixels,and the assimilation pre-processing quality control of satellite data by using a unified file format and in accordance with the requirements of the data assimilation system.In the variational as-similation of numerical forecasts,assimilation pre-processing filters effective information from satellite pre-processed measurements,supports the positive contribution of satellite data assimilation to numerical forecast operations,and is an important link in determining the efficiency,quality and effectiveness of as-similation of large quantities of satellite data.In response to the complex format of satellite data from mul-tiple channels,CMA has developed a standard format of high time-sensitive satellite data splicing technolo-gy in the pre-processing of satellite data assimilation,which effectively reduces the negative impact of the time lag of whole-orbit satellite data on operational numerical prediction.In the assimilation pre-processing of Fengyun satellite data,the assimilation prequality control of multi-spectral data fusion is achieved by front-loading cloud and precipitation detection,data analysis,analysis and other processing into the assim-ilation pre-processing,which ensures the positive assimilation contribution of Fengyun microwave temper-ature sounding data and infrared hyperspectral data.In the development of satellite data assimilation pre-processing technology,reprocessing of pre-processed satellite data by using a unified data format,expan-ding the processing for satellite imagery and active detection data,and front-loading a part of satellite data assimilation quality control function into data assimilation pre-processing are important trends in the devel-opment of future assimilation pre-processing technology for Fengyun satellite data.
numerical weather predictionsatellite measurementspre-processing techniques for satellite data assimilation
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