Abstract
 Landsat Atmospheric Correction: The Good, the Bad, and the Ugly Track: Remote Sensing Imagery Author(s): Lillian Wang, Tracy DeLiberty Atmospheric correction of satellite images is a critical image processing step in which the influence of the atmosphere is removed or greatly reduced. The top of the atmosphere radiant temperature is usually lower than the surface temperature, but it may be reversed when the atmosphere is warmer than the surface. For many applications, this is not acceptable and requires an atmospheric correction model to account for the atmospheric absorption and emission (primarily from water vapor). Surface water temperatures for four Landsat images are calculated. ERDAS IMAGINE image processing software has an add-on module called ATCOR (ATmospheric CORrection) in which atmospheric correction is applied to Landsat images to ensure thermal contrasts within images are due to actual differences in water temperature and not caused by atmospheric effects. The results are compared with in-situ buoy temperatures, and differences range from less than 1 to 5 degrees Celsius. The methodology and results of atmospheric correction will be discussed. Lillian Wang Delaware Geological Survey University of Delaware Delaware Geological Survey Bldg. Newark , DE 19716 US Phone: 302-831-1096 E-mail: lillian@udel.edu Tracy DeLiberty University of Delaware Department of Geography University of Delaware Department of Geography Newark , DE 19716 US Phone: 302-831-4084 E-mail: tracyd@udel.edu |
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