The Monte Carlo method and parallel algorithm in infrared mapping model ofterrain object

The temperature profile and infrared exitance of a terrain object were calc ulated by combining domain decomposition method with monte carlo method. Th e object with 3-D complex shape can be divided into several regular sub-zon es, which are described by corresponding coordinate systems. The heat trans fer within every sub-zone was calculated by control volume method and the h eat transfer among sub-zones calculated by thermal mesh method. When the ra diative transfer coefficient (RTC) was calculated by means of monte carlo m ethod,the complication of surface radiative characteristic could be taken i nto account. By application of the RTC, a complicated calculation can be di vided into several relatively easy sub-calculations, and the calculation in several different wavelength bands can be solved parallelly. Tn space-zone (computing zone),the object was divided into a number of domains, then sev eral processors were used simultaneously.