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  • 1980-1984  (2)
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  • 1
    Publication Date: 2019-06-28
    Description: Millimeter and centimeter wave astronomical data of Uranus are presented and discussed. Some recent observations of the brightness distribution across the disk at 2 cm and 6 cm wavelength are reported. Data related to the variability of the microwave spectrum are reanalyzed, taking into account the strong variation of temperature with wavelength, and including up to date data. The results indicate that the brightness temperatures of Uranus have probably reached their maximum values. The evidence for the depletion of ammonia in the upper atmosphere is discussed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Uranus and Neptune; p 225-262
    Format: text
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  • 2
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    In:  Other Sources
    Publication Date: 2019-06-28
    Description: High resolution radio data of Saturn were obtained at 1.3, 2, 6, and 21 cm, at different inclination angles of the ring plane. Results on optical depth measurements in the rings are described. There is no wavelength dependence in the optical depth of the rings between 1.3 and 6 cm. This indicates that there are not many small particles (sizes of a few centimeters) in the B-ring, which ring is responsible for most of the observed obscuration. This result agrees with the Voyager radio occultation experiment.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: CNES Planetary Rings; p 71-74
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