Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1147f&link_type=abstract
Geophysical Research Letters, vol. 9, Oct. 1982, p. 1147-1150. NASA-supported research.
Astronomy and Astrophysics
Astronomy
35
Saturn Atmosphere, Stellar Occultation, Ultraviolet Astronomy, Voyager Project, Atmospheric Composition, Atmospheric Temperature, Gas Density, Hydrogen, Upper Atmosphere, Vertical Distribution
Scientific paper
Occultation of the star Delta-Scorpii by Saturn as recorded by the Voyager Ultraviolet Spectrometer yields the value of the exospheric temperature in the equatorial region to be 800 (+150, -120) K at an altitude of 1540 km above the 1-bar atmospheric pressure level; the H2-density at 1540 km is determined to be 5 (+3.6, -1.8) x 10 to the 9th per cu cm. Temperature gradient in the thermosphere is found to be 1.25 (+0.05, -0.07) K/km. Methane volume mixing ratio at 965 km above the 1-bar pressure level is determined to be 0.00015.
Atreya Sushil K.
Festou Michael C.
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