Title :
Water vapor retrieval for the POLDER-2 mission
Author :
Vesperini, Michèle ; Dubuisson, Philippe ; Ducos, Fabrice
Author_Institution :
Lab. d´´Optique Atmospherique, Univ. de Lille, Villeneuve d´´Ascq, France
Abstract :
A water vapour retrieval algorithm updated for the second POLDER mission onboard ADEOS-2 is described. The relation between TCWV and 910 to 865 nm reflectance ratio is parameterized with a polynomial fit, whose coefficients are determined by using SSM/I TCWV collocated observations over ocean as well as radiative transfer simulated data for higher, statistically less represented, water vapour contents. Spectral variations of the land surface reflectivity are accounted for by a correction factor using the atmospheric window 765 and 865 nm reflectances. Also, the possible bias due to aerosols or non-detected cirrus is evaluated.
Keywords :
aerosols; atmospheric humidity; atmospheric optics; oceanographic techniques; radiative transfer; radiometry; remote sensing; 765 to 865 nm; 910 to 865 nm; POLDER-2 mission; POLarization and Directionality of Earth Reflectances; aerosols; atmospheric window; coefficients; correction factor; land surface reflectivity; near-infrared radiometer; nondetected cirrus; ocean; oceanographic techniques; polynomial fit; radiative transfer; radiosondes; spectral variations; visible radiometer; water vapor retrieval; Atmospheric measurements; Calibration; Geophysical measurements; Oceans; Polynomials; Reflectivity; Satellite broadcasting; Sea measurements; Sea surface; Surface fitting;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International
Print_ISBN :
0-7803-7929-2
DOI :
10.1109/IGARSS.2003.1294426
