Cassini-ISS Observations of Jupiter's Polar Clouds

Details Cassini-ISS Observations of Jupiter's Polar Clouds Cassini-ISS Observations of Jupiter's Polar Clouds

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1109b&link_type=abstract

American Astronomical Society, DPS meeting #38, #11.09; Bulletin of the American Astronomical Society, Vol. 38, p.496

Astronomy and Astrophysics

Astronomy

Scientific paper

We have used high resolution images of Jupiter obtained by Cassini-ISS instrument in the CB2 filter during its flyby of the planet in December 2000, to measure the motions of cloud features between latitudes ±50º to ±80º. Maps of the poles have been constructed to identify and track cloud features in successive image frames. Two techniques have been used, classical cloud tracking and automated two-dimensional autocorrelation of pair of images. We present measurements of the mean zonal wind profile and its fluctuation, and study the properties of different cloud features. In particular we tracked the drift of some anticyclonic ovals between latitudes +50º and +54º that showed a wandering motion, migrating in latitude and correspondingly showing a velocity change from -6 to +11 ms-1.

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