Accession Number : ADA480027


Title :   Verification of Aerosol Optical Depth Retrievals using Cloud Shadows Retrieved from Satellite Imagery


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Sweat, Perry C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a480027.pdf


Report Date : Mar 2008


Pagination or Media Count : 86


Abstract : A technique for deriving aerosol optical depths by measuring the radiance inside and outside of shaded regions is expanded to include shadows from clouds. Previous research focused on utilizing QuickBird satellite imagery. The 2.4 meter resolution of QuickBird allowed for sampling to focus on building-generated shadows. Research was done on several different surface types, including dirt, grass, sand, and pavement. The research presented in this thesis focuses on the challenges presented by attempting this technique with three other types of imagery Moderate Resolution Imaging Spectrometer (MODIS), IKONOS, and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). The lower resolution of MODIS and ASTER does not lend itself to focusing on building shadows, but rather cloud shadows. Results from sampling cloud-generated shadows show this method has promise, much like previous studies and opens up aerosol optical depth determination using this technique to a wide variety of imagery as well as additional sensor platforms.


Descriptors :   *CLOUDS , *SATELLITE IMAGERY , AEROSOLS , VERIFICATION , THESES , RADIOMETERS , OPTICAL DETECTORS , SPECTROMETERS , SHADOWS


Subject Categories : Meteorology
      Photography


Distribution Statement : APPROVED FOR PUBLIC RELEASE