Abstract: The temperature field of the mixed terrain is one of the key problems in the study of infrared radiance characteristics of a target and background. A model of the infrared radiant temperature field of the mixed terrain of soil-vegetation is studied. After analyzing the affecting factors to the temperature field, the mixed terrain of soil-vegetation is defined according to the scope of the coverage fraction of the vegetation. The standard variation and the correlation length of the temperature field of the mixed terrain are analyzed on the basis of the temperature field statistical characteristics of soil and vegetation, respectively. Finally, the changes in these statistical parameters with the coverage fraction of vegetation are discussed, which can provide theoretical basis for infrared scenes simulation and infrared texture generation of the mix terrain. It can be applied to the fields of infrared dynamic scenes simulation and satellite remote scenes efficiently.

Key words: mixed terrain, soil-vegetation, temperature field, coverage fraction