Research on Simulation of Wide Range PMR based on FY-3G MWRI-RM
QU Jianhua
YAN Junjie
AN Hongda
QIN Pin
Abstract：The precipitation measurement radar(PMR)carried by FY-3 Mercury is a new generation of active precipitation measurement load in China,which monitors typhoon,rainstorm and other disastrous weather systems.The PMR provides observation data from Ku and Ka bands,with a narrow width but high accuracy.The microwave imager(MERI-RM)installed on the same platform also has good precipitation measurement capabilities,and its wide cutting range can greatly improve the ground coverage for precipitation measurement.This article proposes using the DNN model to establish the relationship between the brightness temperature of the MWRI-RM and the reflectivity factor of the PMR,simulating the reflection signals of the main measurement channels of the PMR.At the same time,by using wide range observation geometry simulation technology,we establish observation geometry characteristics with the same width as the MWRI-RM,thus improving the observation range of the PMR,and ultimately obtain the PMR simulation data with the same width as the MWRI-RM.Through experimental testing of Typhoon Dussuri,it has been shown that this method can increase the observation width by 60%and achieve a fitting accuracy of 85%in rainfall areas.
Keywords：FY-3Gprecipitation measurement radar(PMR)the microwave imager on FY3G(MERI-RM)DNNobservation geometry
Publication Date：2025-10-25
Online Publishing Date：2025-11-25(First online date of this platform, not the publication date of the document)
Pages：12( 626-637 )