Abstract
The diurnal changes of surface temperature and the spectral reflectances are presented as the results of investigating many data obtained by ground truth. A practical procedure for quantitative measurement of urban thermal environment by multispectral scanner data is proposed and a useful method of ground truth is discussed. The regression analysis between MSS data and ground truth data shows that the spectral reflectance at the ground surface can be accurately determined by MSS data of visual band or near infrared band, and surface temperature can be determined by thermal infrared band. Furthermore, the values obtained by the regression line of infrared band are compared with those obtained by the temperature scale, the latter being estimated by the temperature of MSS black bodies. By observing the atmospheric effects, the importance of ground truth is pointed out.
