Title :
SMOS calibration and validation over the Salar de Uyuni
Author :
Escorihuela, M.J. ; Escorihuela, A. ; Richaume, P. ; Kerr, Y.H.
Author_Institution :
isardSAT, Barcelona, Spain
Abstract :
The Salar de Uyuni is a large, flat and radiometrically homogeneous area. Its extent is several tenths the SMOS footprint and its emissivity is high and rather homogeneous except when flooded (about 3 months per year). It is located in a rather un-inhabitated area with no RFI. Therefore it provides a perfect calibration site for SMOS brightness temperature and the dielectric constant product validation. In this paper several calibration/validation issues were assessed: SMOS and AMSR-E brightness temperature cross-validation over the site, the influence of Full/Dual polarisation mode on SMOS angular signature and L2 dielectric constant product validation.
Keywords :
calibration; geophysical techniques; soil; AMSR-E brightness temperature; L2 dielectric constant product validation; SMOS angular signature; SMOS brightness temperature; SMOS calibration; SMOS footprint; SMOS validation; Salar de Uyuni; calibration issue; calibration site; dielectric constant product validation; polarisation mode; uninhabitated area; validation issue; Brightness temperature; Calibration; Dielectric constant; Dielectric measurements; Extraterrestrial measurements; Microwave radiometry; Temperature measurement; SMOS; Salar de Uyuni; brightness temperature; calibration; dielectric constant; validation;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6351351
