Software for atmospheric correction of space IR measurements elaborated at the Institute of Atmospheric Optics SB RAS is described. The software is intended for two types of application: simulation of space measurements with the use of different satellite-borne and aircraft-borne sensors, as well as atmospheric correction of real-time space IR measurements of the underlying surface temperature (UST) with accounting for key distorting factors based on a priori data on optical-meteorological state of atmosphere and geometry of observations. The MODIS topical satellite data used as the a priori information in the atmospheric correction are concisely described. The structure of the software input data, general scheme, and illustrations of its operation are presented.