Title :
Comparison of Modis Emissivity Observation with Laboratory Measurements
Author :
Mira, M. ; Schmugge, T. ; Caselles, V. ; Valor, E. ; Coll, C.
Author_Institution :
Univ. de Valencia, Burjassot
Abstract :
The main aim of this work is to analyze the thermal infrared (TIR) emissivity retrievals from the Moderate Resolution Imaging Spectrometer (MODIS) sensor onboard National Aeronautics and Space Administration (NASA)´s Terra satellite. The emissivities are compared with the laboratory spectra of the soil samples. Nearly two years of 8-day and monthly composites of TIR surface emissivity data from the day/night LST algorithm were analyzed for temporal variations over White Sands and the Sahara desert. An emissivity increase for band 29 (8.6 mum) was observed at the end of 2005. We believe that the increase is due to soil moisture. The study shows that surface infrared emissivities derived from the MODIS data preserves well the spectral shape of the soils, being the agreement with laboratory measurements about 2 or 3% in average.
Keywords :
emissivity; remote sensing; soil; AD 2005; MODIS sensor; Moderate Resolution Imaging Spectrometer; Sahara desert; Terra satellite; White Sands; laboratory measurements; soil; thermal infrared emissivity retrieval; time 8 day; wavelength 8.6 mum; Image analysis; Image resolution; Image retrieval; Infrared image sensors; Infrared spectra; Laboratories; MODIS; Optical imaging; Soil measurements; Spectroscopy; Remote sensing; emission; infrared measurements; moisture; soil;
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.2008.4779101
