UV linear stokes imaging of optically thin clouds
| Autor: | Meredith Kupinski, James Heath, Dong L. Wu, W. Reed Espinosa, Clarissa M. DeLeon |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Ice crystals business.industry Linear polarization media_common.quotation_subject Polarimeter Polarizer Polarization (waves) medicine.disease_cause law.invention Optics law Sky medicine Cirrus business Physics::Atmospheric and Oceanic Physics Astrophysics::Galaxy Astrophysics Ultraviolet media_common |
| Zdroj: | Polarization Science and Remote Sensing X. |
| Popis: | Cirrus clouds are important to the radiation energy budget due to their temporal duration and >50% global coverage.1 The variety of ice crystal shapes and sizes in a cirrus cloud create challenges differentiating radiation insulated by the Earth's atmosphere from that reflected back to space. The optical thickness of these clouds is often too thin to be sensed using any current passive satellite radiometers. Sensitivity studies in the UV have shown that the angle of linear polarization (AoLP) of solar radiation backscattered from thin cirrus clouds and thin liquid water clouds is rotated.2 Pust and Shaw also demonstrated subvisual clouds detection in degree of linear polarization (DoLP) and AoLP.3 An Ultraviolet Stokes Imaging Polarimeter (ULTRASIP) was designed and developed for optically thin clouds and sky observations in the 360 nm - 450 nm range.4 ULTRASIP is a time modulated polarimeter rotating a wire-grid polarizer in front of a 16-bit, water-cooled, back-illuminated CCD sensor. Polarized light scattering models will be compared in the visible and the UV to motivate measurements in this waveband.5 |
| Databáze: | OpenAIRE |
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