Title :
A New Method for Temperature/Emissivity Separation from Hyperspectral Thermal Infrared Data
Author :
Xinghong Wang ; Xiaoying OuYang ; Bohui Tang ; Zhao-Liang Li ; Zhang, Renhua
Author_Institution :
Key Lab. of Water Cycle & Related Land Surface Processes, Chinese Acad. of Sci., Beijing
Abstract :
The central problem of temperature and emissivity separation (TES) is, as Realmuto had pointed out, that we obtain N spectral measurements of radiance and need to find N+1 unknowns (N emissivities and one temperature), if the atmospheric perturbations are well corrected for. Thus, one constraint must be found in the retrieval to obtain the realistic solution for the temperature/emissivity separation. A new index called `Downwelling Radiance Residual Index´ (DRRI) is proposed to provide this type of constraint. Tests with the simulated hyperspectral thermal infrared (TIR) data sets demonstrate that this new index can provide an accurate and fast Temperature/Emissivity separation.
Keywords :
geophysical techniques; infrared imaging; land surface temperature; remote sensing; ´Downwelling Radiance Residual Index´; N spectral measurements; atmospheric perturbations; hyperspectral thermal infrared data; land surface emissivity; land surface temperature; temperature and emissivity separation method; Atmospheric measurements; Hyperspectral imaging; Hyperspectral sensors; Information retrieval; Land surface; Land surface temperature; Remote sensing; Satellites; Temperature sensors; Testing; DRRI; Hyperspectral thermal infrared data; Land surface emissivity; Land surface temperature (LST); Temperature/Emissivity Separation (TES);
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2008. IGARSS 2008. IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2807-6
Electronic_ISBN :
978-1-4244-2808-3
DOI :
10.1109/IGARSS.2008.4779339
