Graphical measurement of Saturn's oblateness and the radius of the Encke gap

Details Graphical measurement of Saturn's oblateness and the radius of the Encke gap Graphical measurement of Saturn's oblateness and the radius of the Encke gap

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5904b&link_type=abstract

Journal of Geophysical Research, vol. 85, Nov. 1, 1980, p. 5904-5908. NASA-supported research.

Physics

Oblate Spheroids, Planetology, Polarimetry, Saturn Rings, Gaps, Pioneer 11 Space Probe, Raster Scanning, Signal Distortion, Saturn, Radius, Encke Division, Obliquity, Geometry, Shape, Analysis, Data, Imagery, Photometry

Scientific paper

The geometric distortions attendant to spin-scan imaging were extraordinarily manifest in the Pioneer encounter with Saturn. By overlapping graphical predictions of these distortions with raster scans of the raw intensity data, both displayed to the same scale on a Versatec printer-plotter, it is possible to determine the precise geometry of a data-taking sequence. The predictions are quite sensitive to the assumed dimensions of Saturn and its rings. It is accordingly concluded that the ratio of polar to equatorial radius is 0.91 and that the Encke gap is 133,500 km from Saturn's center.

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