Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data

In this study, new and simple algorithms to retrieve cirrus cloud, sediment and aerosol optical depth (AOD) from Moderate Resolution Radiospectrometer (MODIS) imagery is suggested and demonstrated. Techniques used in this thesis are totally new and never been used before by others researchers. Th...

Full description

Saved in:

Bibliographic Details
Main Author:	Amin, Abd Rahman Mat
Format:	Thesis
Language:	English
Published:	2012
Subjects:	QC1-999 Physics
Online Access:	http://eprints.usm.my/46135/1/ABD%20RAHMAN%20BIN%20MAT%20AMIN_HJ.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.46135
record_format	uketd_dc
spelling	my-usm-ep.461352020-02-10T00:54:13Z Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data 2012-02 Amin, Abd Rahman Mat QC1-999 Physics In this study, new and simple algorithms to retrieve cirrus cloud, sediment and aerosol optical depth (AOD) from Moderate Resolution Radiospectrometer (MODIS) imagery is suggested and demonstrated. Techniques used in this thesis are totally new and never been used before by others researchers. The presences of cirrus cloud have been detected utilizing gradient technique algorithm. The algorithm is based on the gradient connecting the 1.38 and 1.24 μm lines of the log– log graph of apparent reflectance against the MODIS wavelength. This algorithm has been tested over the Yellow Sea, Gulf of Martaban, Mediterranean Sea and Atlantic Ocean. The result of this algorithm is then compared with the band ratio technique and the accuracy was determined with percentage difference below 10%. The presence of sediment reflectance in the MODIS imagery not only saturate the ocean color channels, but also enhance the reflectance of near infrared channels used in the atmospheric correction algorithm. This leads to the overestimation of the aerosol contributions and underestimation of the derived water-leaving reflectance in the visible channels. In this study, a new and simple method to detect and mask the presence of sediment reflectance in the MODIS imagery is proposed. The algorithm is based on the difference of the gradient of the line connecting the 0.47 and 2.13 μm channels and 0.47 and 0.66 μm channels of a log–log graph of the apparent reflectance values against their MODIS wavelengths. A sample results over Yellow Sea, Gulf of Martaban and Arabian Sea was demonstrated. The accuracy of the algorithm was tested and determined. 2012-02 Thesis http://eprints.usm.my/46135/ http://eprints.usm.my/46135/1/ABD%20RAHMAN%20BIN%20MAT%20AMIN_HJ.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Fizik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QC1-999 Physics
spellingShingle	QC1-999 Physics Amin, Abd Rahman Mat Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data
description	In this study, new and simple algorithms to retrieve cirrus cloud, sediment and aerosol optical depth (AOD) from Moderate Resolution Radiospectrometer (MODIS) imagery is suggested and demonstrated. Techniques used in this thesis are totally new and never been used before by others researchers. The presences of cirrus cloud have been detected utilizing gradient technique algorithm. The algorithm is based on the gradient connecting the 1.38 and 1.24 μm lines of the log– log graph of apparent reflectance against the MODIS wavelength. This algorithm has been tested over the Yellow Sea, Gulf of Martaban, Mediterranean Sea and Atlantic Ocean. The result of this algorithm is then compared with the band ratio technique and the accuracy was determined with percentage difference below 10%. The presence of sediment reflectance in the MODIS imagery not only saturate the ocean color channels, but also enhance the reflectance of near infrared channels used in the atmospheric correction algorithm. This leads to the overestimation of the aerosol contributions and underestimation of the derived water-leaving reflectance in the visible channels. In this study, a new and simple method to detect and mask the presence of sediment reflectance in the MODIS imagery is proposed. The algorithm is based on the difference of the gradient of the line connecting the 0.47 and 2.13 μm channels and 0.47 and 0.66 μm channels of a log–log graph of the apparent reflectance values against their MODIS wavelengths. A sample results over Yellow Sea, Gulf of Martaban and Arabian Sea was demonstrated. The accuracy of the algorithm was tested and determined.
format	Thesis
qualification_level	Master's degree
author	Amin, Abd Rahman Mat
author_facet	Amin, Abd Rahman Mat
author_sort	Amin, Abd Rahman Mat
title	Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data
title_short	Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data
title_full	Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data
title_fullStr	Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data
title_full_unstemmed	Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data
title_sort	retrieval of environmental parameters over water areas using modis data
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Fizik
publishDate	2012
url	http://eprints.usm.my/46135/1/ABD%20RAHMAN%20BIN%20MAT%20AMIN_HJ.pdf
_version_	1747821617748115456

Retrieval Of Environmental Parameters Over Water Areas Using MODIS Data

Similar Items