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Proceedings Paper

Estimating terra MODIS polarization effect using ocean data
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Paper Abstract

Terra MODIS has been known since pre-launch to have polarization sensitivity, particularly in shortest-wavelength bands 8 and 9. On-orbit reflectance trending of pseudo-invariant sites show a variation in reflectance as a function of band and scan mirror angle of incidence consistent with time-dependent polarization effects from the rotating doublesided scan mirror. The MODIS Characterization Support Team [MCST] estimates the Mueller matrix trending from this variation as observed from a single desert site, but this effect is not included in Collection 6 [C6] calibration. Here we extend the MCST’s current polarization sensitivity monitoring to two ocean sites distributed over latitude to help estimate the uncertainties in the derived Mueller matrix. The Mueller matrix elements derived for polarization-sensitive Band 8 for a given site are found to be fairly insensitive to surface brdf modeling. The site-to-site variation is a measure of the uncertainty in the Mueller estimation. Results for band 8 show that the polarization correction reduces mirror-side striping by up to 50% and reduces the instrument polarization effect on reflectance time series of an ocean target.

Paper Details

Date Published: 17 May 2016
PDF: 9 pages
Proc. SPIE 9827, Ocean Sensing and Monitoring VIII, 98270V (17 May 2016); doi: 10.1117/12.2222585
Show Author Affiliations
Andrew Wald, Global Science & Technology, Inc. (United States)
Jake Brinkmann, Science Systems and Applications, Inc. (United States)
Aisheng Wu, Science Systems and Applications, Inc. (United States)
Jack Xiong, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9827:
Ocean Sensing and Monitoring VIII
Weilin W. Hou; Robert A. Arnone, Editor(s)

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