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Proceedings Paper

Results and lessons learned from MODIS polarization sensitivity characterization
Author(s): J. Sun; X. Xiong; X. Wang; S. Qiu; S. Xiong; E. Waluschka
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Paper Abstract

In addition to radiometric, spatial, and spectral calibration requirements, MODIS design specifications include polarization sensitivity requirements of less than 2% for all Reflective Solar Bands (RSB) except for the band centered at 412nm. To the best of our knowledge, MODIS was the first imaging radiometer that went through comprehensive system level (end-to-end) polarization characterization. MODIS polarization sensitivity was measured pre-launch at a number of sensor view angles using a laboratory Polarization Source Assembly (PSA) that consists of a rotatable source, a polarizer (Ahrens prism design), and a collimator. This paper describes MODIS polarization characterization approaches used by MODIS Characterization Support Team (MCST) at NASA/GSFC and addresses issues and concerns in the measurements. Results (polarization factor and phase angle) using different analyzing methods are discussed. Also included in this paper is a polarization characterization comparison between Terra and Aqua MODIS. Our previous and recent analysis of MODIS RSB polarization sensitivity could provide useful information for future Earth-observing sensor design, development, and characterization.

Paper Details

Date Published: 7 September 2006
PDF: 10 pages
Proc. SPIE 6296, Earth Observing Systems XI, 629605 (7 September 2006); doi: 10.1117/12.679080
Show Author Affiliations
J. Sun, Science System and Applications, Inc. (United States)
X. Xiong, NASA Goddard Space Flight Ctr. (United States)
X. Wang, New Century Applied Science, Inc. (United States)
S. Qiu, New Century Applied Science, Inc. (United States)
S. Xiong, Science Systems and Applications, Inc. (United States)
E. Waluschka, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 6296:
Earth Observing Systems XI
James J. Butler, Editor(s)

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