Polarization calibration using solar radiation background signal scattered from dense cirrus clouds in the visible and ultraviolet wavelength regime

Zhaoyan Liu; Yongxiang Hu; Pengwang Zhai; Shan Zeng; Mark Vaughan; Sharon Rodier; Xiaomei Lu

doi:10.1117/12.2665858

9 August 2023 Polarization calibration using solar radiation background signal scattered from dense cirrus clouds in the visible and ultraviolet wavelength regime

Zhaoyan Liu, Yongxiang Hu, Pengwang Zhai, Shan Zeng, Mark Vaughan, Sharon Rodier, Xiaomei Lu

Author Affiliations +

Proceedings Volume 12327, SPIE Future Sensing Technologies 2023; 123271O (2023) https://doi.org/10.1117/12.2665858
Event: SPIE Future Sensing Technologies, 2023, Yokohama, Japan

Conference Poster

Abstract

In this presentation we describe the application of a previously developed technique that is now being used to correct the daytime polarization calibration of the CALIPSO lidar. The technique leverages the fact that the solar radiation background signals from dense cirrus clouds are largely unpolarized due to the internal multiple reflections within the non-spherical ice particles and the multiple scattering that occurs among these particles. Therefore, the ratio of polarization components of the cirrus background signals provides a good estimate for the polarization gain ratio (PGR) of the lidar. However, in the visible and ultraviolet regime, the molecular contribution is too large to be ignored, and thus corrections must be applied to account for the highly polarizing characteristics of the molecular scattering. This presentation describes the theory and implementation of the molecular scattering correction.

Citation Download Citation

Zhaoyan Liu, Yongxiang Hu, Pengwang Zhai, Shan Zeng, Mark Vaughan, Sharon Rodier, and Xiaomei Lu "Polarization calibration using solar radiation background signal scattered from dense cirrus clouds in the visible and ultraviolet wavelength regime", Proc. SPIE 12327, SPIE Future Sensing Technologies 2023, 123271O (9 August 2023); https://doi.org/10.1117/12.2665858

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