A Study on ASTER/MODIS Radiometric and Atmospheric Correction

Surface reflectance products obtained by satellite optical sensors are very important for understanding of earth surface properties. Land researchers often use the multiple satellite sensors´ products for validation and scale-up studies. There are various surface reflectance products in each project of satellite sensors. Advanced Space-borne Thermal Emission and Reflection Radiometer (ASTER) and Moderate Resolution Imaging Spectroradiometer (MODIS) are onboard the same platform, Terra satellite. One MODIS scene includes several ASTER scenes, and it is very useful for cross-calibration, validation, and scale-up studies. On the other hand, we have developed the system on GEO Grid, which can apply the same atmospheric correction algorithm in VNIR for ASTER and MODIS data. This system can generate rayleigh/ozone/water vapor corrected reflectance quickly by using other satellite atmospheric products. This paper shows the evaluation of our in-house products and ASTER/MODIS surface reflectance products (AST07 and MOD09GHK) obtained Railroad Valley in US.