Radiometric correction based on multi-temporal SPOT satellite images

Radiometric calibration is the basis of data processing for dynamic monitoring of quantitative indicators using multi-temporal remote sensing images. Its purpose is to eliminate the differences of values between the sensor measured and objectives of the spectral reflectance or spectral radiance. Since the spectrum of the SPOT2/4 satellite images covers a small range, the aerosol model can not be corrected by way of FLAASH, therefore in this paper relative radiometric correction is based on PIF after atmospheric correction achieved. Through sampling and analysis, calibration results are more in line with the actual situation of features radiation reflection and achieve normalized radiation of multi-temporal remote sensing images in dynamic monitoring.