Optical reflectance polarimetry of Saturn's globe and rings. IV - Aerosols in the upper atmosphere of Saturn

Details Optical reflectance polarimetry of Saturn's globe and rings. IV - Aerosols in the upper atmosphere of Saturn Optical reflectance polarimetry of Saturn's globe and rings. IV - Aerosols in the upper atmosphere of Saturn

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...48..496s&link_type=abstract

Icarus, vol. 48, Dec. 1981, p. 496-518. Research supported by the Institut National d'Astronomie et de Geophysique.

Astronomy and Astrophysics

Astronomy

9

Aerosols, Optical Reflection, Polarimetry, Polarization (Waves), Saturn Atmosphere, Saturn Rings, Astronomical Models, Atmospheric Models, Data Processing, Mie Scattering, Planetary Structure, Reflectance, Transport Theory, Upper Atmosphere, Wavelengths, Saturn, Optical Properties, Reflectance, Polarimetry, Rings, Procedure, Atmosphere, Aerosols, Structure, Clouds, Composition, Models, Particles, Haze, Thickness, Earth-Based Observations, Diagrams, Geometry, Parameters, Analysis, Wavelengths, Calculations,

Scientific paper

Disk center polarization measurements of Saturn were recorded in orange light covering 18 years of possible time variation, as well as measurements for five wavelengths. Measurements were also recorded at the limb, terminator, and pole, and regional measurements were taken over the disk. These data were analyzed on the basis of Mie scattering theory and transfer theory in planetary atmospheres. A model for the aerosols in Saturn's upper atmosphere is set forth, including the homogeneity of the upper haze layer and an analysis of the measurements in visible light and of wavelength dependency. It is concluded that the main cloud layer is made of transparent spherical particles of radius 1.4 micron and refractive index 1.44. Regional polarization mapping reveals a high degree of polarization around the pole.

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