Deep space point source background infrared radiation signal simulation by IRAS star catalog

This paper presents a stellar point source background radiation model based on IRAS catalog, which is used to simulate the stellar background radiation signals of observers at any time of observation and in the field of view at any longitude, latitude and altitude. First, the data of stellar equatorial longitude, equatorial latitude, magnitude, and radiation intensity recorded at the epoch time in IRAS catalog is used to correct the proper motion, precession and nutation, and the coordinate information of the star at the specified time in the coordinate system of equatorial celestial sphere will be obtained. Then, after a series of coordinate conversions, with the occlusion of the line of sight being taken into consideration, the coordinates of the star at the time of observation are converted into the apparent position relative to the observer in the specified scene. On this basis, the infrared irradiance of stars in the specified field of view is calculated based on the radiation intensity data recorded in the star table. The research results have some reference value for the detection and recognition of space objects.