Long-term changes in reflectivity and larger scale motions in the atmospheres of Jupiter and Saturn

Details Long-term changes in reflectivity and larger scale motions in the atmospheres of Jupiter and Saturn Long-term changes in reflectivity and larger scale motions in the atmospheres of Jupiter and Saturn

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept...17b&link_type=abstract

In NASA, Washington Reports of Planetary Astronomy, 1985 p 17-18 (SEE N87-12407 03-89)

Astronomy and Astrophysics

Astronomy

Jupiter Atmosphere, Planetary Mapping, Saturn Atmosphere, Spectral Reflectance, Annual Variations, Atmospheric Circulation, Galileo Probe, Radar Imagery

Scientific paper

A multi-color, broad-band photographic program for monitoring atmospheric variability of Jupiter and Saturn with the 61-cm, f/75 telescope was continued. The archivial product consists of approximately 20 sequential images on 3 1/4 x 4 1/4 glass plates with a plate scale of 4.53 arc sec/mm. An eleven-step sensitometric wedge, recorded times of acquisition, and fiducial marks which determine the orientation of the plate, are recorded on each individual plate. This allows accurate positional measurements, as well as detailed relative surface brightness determinations. Detailed measurements of the Red Spot are being utilized in a study of zonal velocity variation and the ability to predict the longitude of the Red Spot during the Galileo mission. An ongoing 5-color series of Saturn has been maintained to map the seasonal changes in the belt-zone reflectivity. Digitization of a series of blue images containing the Red Spot and a series of red and blue images excluding the Red Spot are being processed and reduced to normalized surface brightness maps. This data is being utilized to map time-dependent brightness variations of selected features, belts, and ones.

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