Total and polarized radiance from the ocean surface from hyperspectral polarimetric imaging

Alex Gilerson; Carlos Carrizo; Robert Foster; Tristan Harmel; Andrii Golovin; Ahmed El-Habashi; Eder Herrera; Trevor Wright

doi:10.1117/12.2521143

10 May 2019 Total and polarized radiance from the ocean surface from hyperspectral polarimetric imaging

Alex Gilerson, Carlos Carrizo, Robert Foster, Tristan Harmel, Andrii Golovin, Ahmed El-Habashi, Eder Herrera, Trevor Wright

Author Affiliations +

Proceedings Volume 11014, Ocean Sensing and Monitoring XI; 110140F (2019) https://doi.org/10.1117/12.2521143
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

Results are presented for measurements of the total and polarized radiances from the ocean surface by a state-of-the-art snapshot hyperspectral imager, which simultaneously acquires spectra with 4nm spectral resolution in the wavelength range of 450-950nm within a 40° field-of-view. The imager does not require any along track movement and allows the continuous collection of hyperspectral imagery from stationary structures or slow moving platforms such as ships or helicopters. In addition, a computer controlled filter wheel is installed in front of the imager allowing for division-oftime Stokes vector images from the ocean surface. Experiments are aimed at the application of the multi-angular polarimetric measurements for the retrieval of water parameters in addition to the ones retrieved from traditional unpolarized methods. Several sets of measurements used in the analysis were acquired from ocean platform in the NYC area, Duck, NC and from shipborne observations in the Gulf of Mexico and along the Florida coast. Measurements made by the imager are compared with simulations using a vector radiative transfer code showing good agreement. Analysis of pixel-to-pixel variability of the total and polarized above water radiance for the viewing angles of 20°-60° in different wind conditions enable the estimation of uncertainties in measurements of these radiances in un-polarized and polarized modes for the whole spectral range, thus setting requirements for the quality of polarized measurements. Impacts of aerosols on spectral variations of both the radiance and the polarized terms of the Stokes vector are studied.

Conference Presentation

Citation Download Citation

Alex Gilerson, Carlos Carrizo, Robert Foster, Tristan Harmel, Andrii Golovin, Ahmed El-Habashi, Eder Herrera, and Trevor Wright "Total and polarized radiance from the ocean surface from hyperspectral polarimetric imaging", Proc. SPIE 11014, Ocean Sensing and Monitoring XI, 110140F (10 May 2019); https://doi.org/10.1117/12.2521143

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available