Comparative studies of IR radiation characteristics of typical ground based on a uniform model

The uniform model of three kinds of typical grounds, i. e. dry bare ground, wet bare ground and ground covered by low vegetation, was constructed base d on the heat balance equation of ground surfave. All kinds of factors were under consideration. In calculation, the Monte-Carlo simulation was used t o analyze the above natural ground's periodical infrared radiance statistic s and the influence on the average value and variance (fluctuation) of the infrared radiation temperature caused by the above circumstance factors. Th e experimental results show that the model can simulate the infrared radian ce statistics of the above typical ground fairly well.