Effects of Assimilating Clear-Sky FY-3D MWHS2 Radiance on the Numerical Simulation of Tropical Storm Ampil

A new advanced microwave humidity sounder FY-3D MWHS2 radiance has been assimilated under the clear-sky conditions by implementing its data assimilation interface. The case of tropical storm Ampil in 2018 is selected to address effectiveness new-built module initialization and forecast typhoons. Apart from experiment assimilating both Global Telecommunications System (GTS) data, an with only GTS also conducted for comparison. results show that bias correction this effective, analysis field after matches well observation. increment specific below middle layers evident data. Besides, geopotential height at 500 hPa 850 hPa, respectively, are favorable, resulting more accurate rain belt distribution a higher fraction skill score (FSS). In deterministic forecast, track error consistently less than 90 km.