Synoptic observations of Jupiter's radio emissions: Average Statistical properties observed by Voyager

Details Synoptic observations of Jupiter's radio emissions: Average Statistical properties observed by Voyager Synoptic observations of Jupiter's radio emissions: Average Statistical properties observed by Voyager

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8028285a&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Jupiter (Planet), Radio Astronomy, Radio Emission, Synoptic Measurement, Voyager Project, Circular Polarization, Decametric Waves, Low Frequencies, Radiant Flux Density, Statistical Analysis

Scientific paper

Observations of Jupiter's low frequency radio emissions collected over one month intervals before and after each Voyager encounter were analyzed. Compilations of occurrence probability, average power flux density and average sense of circular polarization are presented as a function of central meridian longitude, phase of Io, and frequency. The results are compared with ground based observations. The necessary geometrical conditions are preferred polarization sense for Io-related decametric emission observed by Voyager from above both the dayside and nightside hemispheres are found to be essentially the same as are observed in Earth based studies. On the other hand, there is a clear local time dependence in the Io-independent decametric emission. Io appears to have an influence on average flux density of the emission down to below 2 MHz. The average power flux density spectrum of Jupiter's emission has a broad peak near 9MHz. Integration of the average spectrum over all frequencies gives a total radiated power for an isotropic source of 4 x 10 to the 11th power W.

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