Verification of aerosol optical depth retrievals from cloud shadows using satellite imagery
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Authors
Sweat, Perry C.
Subjects
Aerosol
Shadow Method
QuickBird
ASTER
MODIS
IKONOS
Aerosol Optical Depth Retrieval
Cloud Shadows
Shadow Method
QuickBird
ASTER
MODIS
IKONOS
Aerosol Optical Depth Retrieval
Cloud Shadows
Advisors
Durkee, Philip A.
Date of Issue
2008-03
Date
Publisher
Monterey, CA: Naval Postgraduate School
Language
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.
Type
Thesis
Description
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Department
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NPS Report Number
Sponsors
Funder
Format
xv, 69 p. : ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.