@inproceedings{be20e204fac048ecae0d3ec39b3109a7,
title = "Cloud thermodynamic phase detection with a 3-channel shortwave infrared polarimeter",
abstract = "Knowing the thermodynamic phase of a cloud-whether it is composed of spherical water droplets or polyhedral ice crystals-is critical in remote sensing applications and in climate studies. We recently showed that we can determine cloud phase with visible-wavelength sky polarimetry, and in this presentation we extend that method to shortwave infrared wavelength bands near 1.6 microns. We describe the instrument, a passive, three-channel polarimeter with spectral bands at 1550 nm, 1640 nm, and 1700 nm with approximate width of 40 nm and how we are using it in experiments to discriminate between liquid-water and ice clouds. This portable polarimeter measures scattered sunlight using polarizers orientated at 0°, 45‡, and 90° with respect to the solar vertical scattering plane. It has a 4.9° field-of-view and a motorized, computer-controlled pan-And-Tilt mount that controls the positioning of the polarimeter so that it can measure any point in the sky.",
keywords = "Atmospheric radiation, Cloud thermodynamic phase, Polarimetry",
author = "Tauc, {Martin Jan} and Baumbauer, {Carol L.} and Benjamin Moon and Abel, {Andrew M.} and Riesland, {David W.} and Eshelman, {Laura M.} and Wataru Nakagawa and Shaw, {Joseph A.}",
note = "Publisher Copyright: {\textcopyright} 2018 SPIE.; Polarization: Measurement, Analysis, and Remote Sensing XIII 2018 ; Conference date: 16-04-2018 Through 17-04-2018",
year = "2018",
doi = "10.1117/12.2305171",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
editor = "Goldstein, {Dennis H.} and Chenault, {David B.}",
booktitle = "Polarization",
}