NOAA/AVHRRの観測輝度温度に基づくLANDSAT/TMの観測輝度温度誤差の補正

抄録

The purposes of this study are to investigate quantitative characteristics of brightness temperature of LANDSAT/TM and to propose convenient method to rectify it. By the regression analysis between brightness temperature of TM/Band 6 and that of NOAA/AVHRR/Channel 4 and 5, it was proved that the brightness temperature of TM has wider dynamic range than that of AVHRR. Then, the equation for rectifying the error of the brightness temperature of TM was derived based on the regression analysis. The rectification by this equation provided good accordance between temporal change of land surface's brightness temperature and that of air temperature. The rectified brightness temperature also got closer to the surface temperature measuered on the ground. These results verified that rectification of the brightness temperature of TM by the regression is a practical method to improve its reliability.