UV linear stokes imaging of optically thin clouds

Clarissa M. Deleon, James Heath, W. Reed Espinosa, Dong Wu, Meredith Kupinski

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publicationPolarization Science and Remote Sensing X
EditorsMeredith K. Kupinski, Joseph A. Shaw, Frans Snik
ISBN (Electronic)9781510645042
StatePublished - 2021
EventPolarization Science and Remote Sensing X 2021 - San Diego, United States
Duration: Aug 1 2021Aug 5 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferencePolarization Science and Remote Sensing X 2021
Country/TerritoryUnited States
CitySan Diego


  • Polarization
  • UV polarimetry
  • aerosol retrievals
  • cirrus clouds
  • remote sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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