CORRELATION OF THERMAL SATELLITE IMAGE DATA FOR GENERATING THERMAL MAPS AT HIGH SPATIAL RESOLUTION

摘要

The invention relates to a method and a device for producing a thermal map of an area, wherein the thermal map is generated by a combination of two thermal images of different properties, and both thermal images comprise pixels associated with the area and have been recorded by satellites. The two thermal images are recorded at different times using different recording devices. Furthermore, a radiometric precision of the first thermal image is higher than that of the second thermal image, and a spatial resolution of the second thermal image is higher than that of the first thermal image. The two thermal images are used to determine a measurement value offset of a first pixel group belonging to the second thermal image and spatially associated with the area, and then corrected absolute measurement values of the pixels belonging to the second thermal image and spatially associated with the area are determined. A precise thermal map of the area is then created on this basis. The invention also relates to a method for determining a time series of thermal maps and a computer programme product for carrying out the method described.