Photometry and polarimetry of Jupiter at large phase angles. I - Analysis of imaging data of a prominent belt and a zone from Pioneer 10

Details Photometry and polarimetry of Jupiter at large phase angles. I - Analysis of imaging data of a prominent belt and a zone from Pioneer 10 Photometry and polarimetry of Jupiter at large phase angles. I - Analysis of imaging data of a prominent belt and a zone from Pioneer 10

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...33..558t&link_type=abstract

Icarus, vol. 33, Mar. 1978, p. 558-592. NASA-NSF-supported research.

Astronomy and Astrophysics

Astronomy

32

Astronomical Photometry, Imaging Techniques, Jupiter Atmosphere, Light Scattering, Pioneer 10 Space Probe, Polarimetry, Atmospheric Models, Limb Darkening, Phase Shift, Photometry, Polarimetry, Jupiter, Pioneer 10, Brightness, Limbs, Spectroscopy, Albedo, Atmosphere, Optical Properties

Scientific paper

Photopolarimetric observations of a prominent bright zone and a dark belt of Jupiter in red and blue light are analyzed which were performed by Pioneer 10 at phase angles of 12, 23, 34, 109, 120, 127, and 150 deg. Geometric and photometric reductions of the imaging data are described, the instrument sensitivity at various times is evaluated, and the data are referred to an absolute scale. The observations are analyzed in detail by comparing the data with results of radiative-transfer calculations for specific scattering models of Jupiter's atmosphere. These models include those with a vertical structure consisting of a layer of Rayleigh-scattering gas above a semiinfinite mixture of cloud particles and gas, those having a small quantity of aerosols in the gas above either the diffuse cloud in a reflecting-scattering model or the top cloud of a two-cloud-layer model, those in which a forward-scattering haze is mixed uniformly with gas, and those containing dust layers. It is found that in both the belt and the zone in red as well as blue light, cloud phase functions are required which provide both strong forward scattering and some backscattering.

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