Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980sci...207..431j&link_type=abstract
Science, vol. 207, Jan. 25, 1980, p. 431-434.
Astronomy and Astrophysics
Astronomy
25
Astronomical Photometry, Planetary Atmospheres, Saturn (Planet), Ultraviolet Photometry, Airglow, Cloud Cover, Hydrogen Atoms, Latitude, Limb Darkening, Spectral Emission, Spectral Resolution, Titan, Wavelengths, Saturn, Ultraviolet, Photometer, Observations, Clouds, Atmosphere, Pioneer 11, Satellites, Titan, Features, Hydrogen, Disk, Rings, Spectrum, Wavelengths, Emissions, Geometry, Equipment, Lyman-Alpha Radiation
Scientific paper
Several interesting cloud and atmospheric features of the Saturn system have been observed by the long-wavelength channel of the two-channel ultraviolet photometer aboard the Pioneer Saturn spacecraft. Reported are observations of the most obvious features, including a Titan-associated cloud, a ring cloud, and the variation of atmospheric emission across Saturn's disk. The long-wavelength data for Titan suggest that a cloud of atomic hydrogen extends at least 5 Saturn radii along its orbit and about 1.5 Saturn radii vertically. A ring cloud, thought to be atomic hydrogen, has also been observed by the long-wavelength channel of the photometer; it shows significant enhancement in the vicinity of the B ring. Finally, spatially resolved observations of Saturn's disk show significant latitudinal variation. Possible explanations of the variation include aurora or limb brightening.
Carlson Richard W.
Judge Darrell L.
Wu Fun-Min
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