By Topic

In-flight calibration of the POLDER polarized channels using the Sun's glitter

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
Toubbe, B. ; Lab. d''Opt. Atmos., Univ. des Sci. et Tech. de Lille Flandres Artois, Villeneuve d''Ascq, France ; Bailleul, T. ; Deuze, J.L. ; Goloub, P.
more authors

The spaceborne sensor Polarization and Directionality of the Earth Reflectances (POLDER), launched on the Japanese platform Advanced Earth Observation Satellite (ADEOS) on August 17, 1996, is a new instrument devoted to multispectral observations of the directionality and polarization of the solar radiation reflected by the Earth-atmosphere system. Polarization measurements are performed in three channels, centered at 443, 670, and 865 nm. As POLDER has no onboard calibration system, in-flight calibration methods have been developed. The authors address in this paper the calibration of the polarization measurements. The method uses the sunlight reflected within the Sun's glitter. While the radiance of the Sun's glitter depends strongly on the sea surface roughness, its intrinsic degree of polarization depends only on the observation geometry, which is specially convenient for calibration purposes. However, the degree of polarization measured at the satellite level is affected by the atmosphere. The proposed calibration scheme allows the authors to take into account the influence of the atmosphere on the degree of polarization measured in some viewing direction within the glitter pattern by using the radiance measured in the same viewing direction and in another direction far from the glitter. The expected accuracy is about 0.5% in the near-infrared channel 865 nm and about 2% in the visible channels, in terms of percent polarization. The method has been applied successfully to measurements achieved over ocean areas with the airborne version of the POLDER instrument

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:37 ,  Issue: 1 )