Title :
Recovering spectral emissivity with ASTER-thermal data from Tenerife Island
Author :
Barreto, A. ; Arbelo, M. ; Nuez-Casillas, L. ; Hernandez-Leal, P. ; Gonzalez-Calvo, A. ; Alonso-Benito, A.
Author_Institution :
Dept. de Fis., Univ. de La Laguna, La Laguna, Spain
Abstract :
We validated surface emissivity retrieved by means of temperature and emissivity separation (TES) and normalized emissivity method (NEM) with ASTER data. We selected four days and three different test areas within Tenerife Island, located over 1800 m, and one more in the sea level. This different range in altitude is used to study the atmospheric effect on emissivity retrieved from satellite. Significant differences in spectral emissivity were found for zones catalogued as low contrast surfaces (vegetation, sea surface and Mt. Chahorra volcanic rock), from 0.015 to 0.111, while results obtained for Mt. Blanca volcanic rock are excellent.
Keywords :
data acquisition; emissivity; geophysical techniques; radiometry; remote sensing; ASTER-thermal data; Mt. Blanca volcanic rock; Mt. Chahorra volcanic rock; Spain; Tenerife Island; atmospheric effect; brightness temperature; low contrast surface; normalized emissivity method; sea surface; spectral emissivity; surface emissivity retrieval; temperature-emissivity separation; vegetation; Geologic measurements; Information retrieval; Ocean temperature; Remote monitoring; Satellites; Sea level; Sea measurements; Sea surface; Testing; Vegetation; Emissivity; NEM; TES and ASTER;
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
DOI :
10.1109/IGARSS.2009.5418016
