ATMOSPHERIC CORRECTION METHODOLOGY FOR ASTER, RAPIDEYE, SPOT 2 AND LANDSAT 8 IMAGES WITH ENVI FLAASH MODULE SOFTWARE
DOI:
https://doi.org/10.15359/rgac.2-53.2Keywords:
radiometric correction, atmospheric correction, satellite sensors, MODTRAN4, ENVI FLAASHAbstract
The atmospheric correction process is applied to digital images in order to remove distortions induced by aerosols and intrinsic radiance introduced in a sensor and reflected in the image as a result of the interactions between the sensor and the atmosphere. By the atmospheric correction process, it’s possible to improve the overall visual quality of an image and to remove the intrusive component of the atmosphere. This paper describes the atmospheric correction process, using ENVI’s FLAASH module software, applied to data collected by four different satellite sensors: Aster, RapidEye, Spot 2 and Landsat 8. For Aster and Spot 2, atmospheric correction is shown for orthorectified GeoTIFF data that does not include the associated wavelength components, therefore the process includes the setting of these values in the image. For RapidEye and Landsat 8, the process is applied to orthorectified GeoTIFF data that includes the wavelengths components attached to the metadata for each image.
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