Dual-band infrared polarization measurements of sun glint from the sea surface

Dennis J. Gregoris; Simon K.W. Yu; Alfred W. Cooper; Edmund A. Milne

doi:10.1117/12.137866

21 September 1992 Dual-band infrared polarization measurements of sun glint from the sea surface

Dennis J. Gregoris, Simon K.W. Yu, Alfred W. Cooper, Edmund A. Milne

Proceedings Volume 1687, Characterization, Propagation, and Simulation of Sources and Backgrounds II; (1992) https://doi.org/10.1117/12.137866
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

This paper presents a sea radiance polarization model and experimental measurements of near- horizon sea glint polarization in the 3 - 5 micrometers and 8 - 12 micrometers spectral bands. The experimental measurements include the effects of polarization on the glint statistics, the degree of linear polarization and the polarization signal-to-noise ratio (SNR) improvement factor for both spectral bands in the presence of sea glint. The results indicate that the polarization in the 3 - 5 micrometers spectral band is dominated by the reflected solar and sky radiance and is polarized in the s plane. The polarization of intense sea glint in the 8 - 12 micrometers region is low and s polarized due to the weak solar spectrum in this band. In little or no glint, the radiation is weakly p polarized. Experimental data indicate that a polarizing filter can produce a significantly larger SNR improvement for the 3 - 5 micrometers spectral band than for the 8 - 12 micrometers band. Theoretical calculations using the polarization model show good agreement with the experimental data.

Citation Download Citation

Dennis J. Gregoris, Simon K.W. Yu, Alfred W. Cooper, and Edmund A. Milne "Dual-band infrared polarization measurements of sun glint from the sea surface", Proc. SPIE 1687, Characterization, Propagation, and Simulation of Sources and Backgrounds II, (21 September 1992); https://doi.org/10.1117/12.137866

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