Abstract
Measurements of Saturn's He 584 A dayglow and the CH4 density profile deduced from stellar occultation data near the homopause have been combined to infer an eddy diffusion coefficient of 8±4 × 107 cm²s−1 and a temperature of K near the homopause at Voyager 2 encounter. It appears the eddy diffusion coefficient may have increased between the Voyager encounters. Saturn's H Lyα dayglow is qualitatively compatible with this increase and the interpretation of the He 584 A dayglow and CH4 absorption measurement.
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