A NEW MODEL FOR IR RADIANCE STATISTICS OF NATURAL TERRAIN

Based on the heat balance equation for the terrain surface and by sele cting the short-wavelength absorptivity, long-wavelength emissivity, h eat conductivity and wind speed as the random variables, a new model f or radiative temperature statistics of the natural terrain has been de veloped, in which all the heat and water flux exchanges between terrai n surface and atmosphere are considered. The influence of the field fl uctuation in these random variables on the statistics distribution of radiative temperature is described and the comparison between radiance statistics of wet surfaces and that of dry surfaces is given. (C) 199 7 Elsevier Science B.V.