Accession Number : ADA300123

Title :   Calibration of the Scanning Spectral Polarimeter and Measurement of the Sky Light Polarization.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Ries, Vincent T.

PDF Url : ADA300123

Report Date : 10 SEP 1995

Pagination or Media Count : 114

Abstract : The Scanning Spectral Polarimeter (55 P) measures 6 optical properties: flux, unpolarized radiance, and four polarized radiances (parallel, perpendicular, right hand circular, and left hand circular) through the spectral region from 400 nm - 4000nm. The SSP was designed for the measurement of reflected sunlight and a complete description is provided. This thesis asses the ability of the SSP to measure the clear sky spectral polarization. Initial calibration procedures and results are discussed. Instrument characteristics are provided to include, field of view, transmission function for the diffuse channel, and detector calibration coefficients. A plane polarized radiative transfer model is used to study the effects local conditions have on the sky light polarization. The impacts of changing Rayleigh optical depth, surface albedo, solar position, and haze loading are examined. The 5SF is used to measure the spectral sky light polarization and the results are compared to those values predicted by the model. The SSP can determine sky light polarization to within 10% error with respect to the model predictions and was capable of resolving the effects aerosol scattering and surface reflection have on sky polarization. (MM)

Descriptors :   *ATMOSPHERIC SCATTERING, *LIGHT TRANSMISSION, *POLARIMETERS, *OPTICAL DETECTORS, *CLOUD PHYSICS, *SKY BRIGHTNESS, OPTICAL PROPERTIES, POLARIZATION, AEROSOLS, LIGHT, THESES, RADIATIVE TRANSFER, REFLECTION, ICE FORMATION, RAYLEIGH SCATTERING, RADIANCE, CLIMATE, DATA ACQUISITION, DIFFUSION, SPECTRAL ENERGY DISTRIBUTION, SOLAR RADIATION, CLOUD COVER, ATMOSPHERIC ATTENUATION, HAZE, ALBEDO, SUNLIGHT.

Subject Categories : Atmospheric Physics
      Optical Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE