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An Optimization Algorithm for Separating Land Surface Temperature and Emissivity from Multispectral Thermal Infrared Imagery

dc.contributor.authorLiang, Shunlin
dc.date.accessioned2007-02-28T21:07:44Z
dc.date.available2007-02-28T21:07:44Z
dc.date.issued2001-02
dc.identifier.citationLiang, S., (2001), An Optimization Algorithm for Separating Land Surface Temperature and Emissivity from Multispectral Thermal Infrared Imagery, IEEE Transactions on Geoscience and Remote Sensing, 39: 264-274.en
dc.identifier.urihttp://hdl.handle.net/1903/4327
dc.description.abstractLand surface temperature (LST) and emissivity are important components of land surface modeling and applications. The only practical means of obtaining LST at spatial and temporal resolutions appropriate for most modeling applications is through remote sensing. While the popular split-window method has been widely used to estimate LST, it requires known emissivity values. Multispectral thermal infrared imagery provides us with an excellent opportunity to estimate both LST and emissivity simultaneously, but the difficulty is that a single multispectral thermal measurement with bands presents equations in + 1 unknowns ( spectral emissivities and LST). In this study, we developed a general algorithm that can separate land surface emissivity and LST from any multispectral thermal imagery, such as moderate-resolution imaging spectroradiometer (MODIS) and advanced spaceborne thermal emission and reflection radiometer (ASTER). The central idea was to establish empirical constraints, and regularization methods were used to estimate both emissivity and LST through an optimization algorithm. It allows us to incorporate any prior knowledge in a formal way. The numerical experiments showed that this algorithm is very effective (more than 43.4% inversion results differed from the actual LST within 0.5 , 70.2% within 1 and 84% within 1.5 ), although improvements are still needed.en
dc.format.extent307697 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.publisherInstitute of Electrical and Electronics Engineersen
dc.subjectemissivityen
dc.subjectland surface temperatureen
dc.subjectremote sensingen
dc.subjectthermal infrareden
dc.titleAn Optimization Algorithm for Separating Land Surface Temperature and Emissivity from Multispectral Thermal Infrared Imageryen
dc.typeArticleen
dc.relation.isAvailableAtCollege of Behavioral & Social Sciencesen_us
dc.relation.isAvailableAtGeographyen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, Md.)en_us
dc.rights.licenseCopyright Institute of Electrical and Electronics Engineers.en_us


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