WBGT ESTIMATION USING BRIGHTNESS TEMPERATURE OF HIMAWARI-8 SATELITE IN KANTO REGION

Abstract

 We proposed a formula to estimate WBGT from the brightness temperature of Himawari-8. The brightness temperature of Band 7, 13, and 15, which correspond to the thermal infrared bands, were used for this purpose since they were highly correlated with the WBGT observations near the ground. The effects of thick clouds were removed based on the thresholds for the brightness temperatures. The formula of the WBGT was derived from the multiple regression analysis. The RMSE of the estimated WBGT was less than 3.0 ℃ at about 75% of 74 observation points in Kanto region.