ongLiuLihui。WuHeng。XuShuang。(1NanjingVniversityofInformationScienaandTechnology,Nanjing210044;2HebeiProvincialMeteorologicalServiceShijiazhuang050021;3XingtaiMeteor01ogica1Service,Hebei,Xingtai054000)Abstract:Theveracityofthesoundingdataandweatherforecastswouldbeinfluencedifthesoundinginstrumentwasdegenerated.Thesoundingdata.suchastheheightandmeteorologicalelements渍theisobaricsurface,theascendingvelocityoftheballoon,andaltitudedifferenceprofiles,areanalyzed.Thecharacteristicsofdifferentsoundinginstrumentdegenerationanddiscriminationmethodsaresummarized.binedwithgraphics,parison,thetimetochangeforinductioncurvescanbedetermined.Thusthesoundingdatacanbetreatedtimelyandeffectively,andthequalityofthesoundingdatacanbeimproved.Keywords:soundinginstrument;urve;isobaricsurface;meteorologicalelement