Reconstruction of 6S for Satellite Images in Iran's Atmosphere (Case Study: Tehran)

The process of Remote Sensing is affected by several errors such as geometrical deterioration, radiometric imbalance and atmospheric effects among which the former has significant role. In this work using Radiosonde data of 5 years, a mean profile of the atmosphere for the region of the study were calculated. Then introducing this profile to 6S code, the images of the region were corrected for the effects of the atmosphere. The results were compared with those of corrected by predefined profiles such as Midsummer, Midwinter and Subtropical. The results show significant improvement in band 17 of MODIS. To compare the output images, the NDVI products of the region were used. It shows that the NDVIs of less than 0.4 decreases while those of more than 0.5 increases. This is in accordance with the results of other researchers.