Abstract: InordertoaccuratelypredicttheonorbittemperatureoftheTan-Satloading，theresearchfortransientthermalanalysismodelcorrectionundertestconditionswaspresented.Comparedtheresultsbetweenthermalanalysiscalculationandthermalbalancetest，temperaturedifferencesofthetemperaturemonitorswereconfirmed.ParametricsensitivityanalysisofcarbondioxidedetectorthermalanalysismodelwascompletedbytheMonteCarlomethod，andmodelparametersweredividedintoglobalsensitive，localsensitiveandinsensitiveparameters.Accordingtothedataofthermalbalancedtest，theLatinhypercubesamplingandsimplexmixedmethodswereappliedtocorrectmodelparametersbytheclassificationlayerbylayer，andtheoptimalvalueswerecalculated.Thesevaluesweretakenintothethermalanalysismodeltoverifytheaccuracyofthecorrectionmethodandanalyzetheresidualerror.Correctionresultsshowthatthecorrectedtemperaturedifferenceδ_aislessthan±0.5℃forallthetemperaturemonitors，theresidualerrorcorrectionratesθaregreaterthan80%，whilemosttemperaturedifferencesreduceanorderofmagnitudeaftercorrection.Theseresultsillustratethecorrectioniseffectiveandthemethodisreasonableandfeasible.

Key words: carbondioxidedetector, modelcorrection, thermalbalance, thermalanalysis, sensitivityclassification, MonteCarlomethod, hierarchicalcorrection