Physics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.4107c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, May 1, 1988, p. 4107-4109. NASA-supported research.
Physics
10
Corotation, Ionospheric Conductivity, Planetary Ionospheres, Planetary Magnetospheres, Saturn Atmosphere, Atmospheric Models, Collision Rates, Polar Caps, Saturn, Corotation, Magnetosphere, Ionosphere, Conductivity, Diffusion, Atmosphere, Calculations, Parameters, Flow, Friction, Torque, Spin, Angular Momentum
Scientific paper
In view of the recent publication of Eviatar and Richardson (1986), who have calculated the Pedersen conductance of Saturn's ionosphere to be much smaller than previous estimates, the Pedersen conductance is recalculated using the same neutral atmosphere model as these authors. The results confirm the earlier estimates that the ionospheric Pedersen conductance of Saturn's ionosphere ranges from 0.3 to 17 mho near the terminator as a function of latitude. The source of discrepancy appears to be the inclusion by Eviatar and Richardson of ion density into the ion-neutral collision frequency term, which is incorrect. Contrary to the conclusion of Eviatar and Richardson, Saturn's ionospheric Pedersen conductance is high enough to impose nearly perfect corotation between the ionosphere and the magnetosphere.
Cheng Andrew F.
Waite H. Jr. J..
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