THE STUDY OF RELATIONSHIP BETWEEN THE GROUND TARGETS SPECTRAL DATA AND ATM DATA

摘要

In this paper, based on analysing action between magnetoelectric wave through the atmosphere and the ground targets each other, mathematical model of the relationship between the ground targets spectral data and ATM data is derived from theory, and the physical significance of correlation parameters are given. According to ATM data(DS-1268 Scanner) and the spectral data of the field synchronization measurements (IRIS Spectroradiometer) at three test fields(Goldsea lake, Gaoyang and Anxin county), by using the analysis method of the statistical regression, the linear regression equations between the ON of each band of ATM(total twelve bands) and the reflectance brightness of the ground correspondence wave length are obtained under all kinds of conditions, (such as different test fields, periods, flight heights and detection angles etc.). Taking advantage of this quantitative relationship equation, the original images of ATM are directly transformed into the ground efficient reflectance brightness images.In the transformation procedure, the atmospheric transmittance and path's radiance don't need to know. The efficient reflectance brightness images is able to reflect the ground targets spectral properties. Therefore, the effects of the atmosphere between the ground and the DS-1268 sensor are eliminated, and the image order is apparently improved. Moreover, the relationships between the atmospheric transmissivity and flight heights, detection angles and the atmospheric transmissivity are discussed.