Abstract
Through the analysis of three and a half years' Landsat MSS imagery data, it was found that temporal variation of geometric distortion in the Landsat MSS data existed. Furthermore, it was also found that the variation is closely related to the stratspheric temperature above equatorial region with the correlation coefficient of 0.81. Based on this fact, it is considered desirable that infrared horizon model, the basis of the attitude determination, be modified adaptively in accordance with actual stratspheric temperature distribution. From the results obtained from geometric accuracy tests with a variety of the peak radiance from CO2 and half power height of CO2 radiance based on radio sounding data of a single station in a equatorial region, possibility of a slight improvement on the geometric accuracy of Landsat imagery data was confirmed.
