The occurrence rate, polarization character, and intensity of broadband Jovian kilometric radiation

Details The occurrence rate, polarization character, and intensity of broadband Jovian kilometric radiation The occurrence rate, polarization character, and intensity of broadband Jovian kilometric radiation

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.4248d&link_type=abstract

Journal of Geophysical Research, vol. 85, Aug. 1, 1980, p. 4248-4256.

Astronomy and Astrophysics

Astronomy

9

Jupiter (Planet), Planetary Radiation, Radio Astronomy, Low Frequencies, Polarization Characteristics, Radiant Flux Density, Jupiter, Kilometer Waves, Radiation, Intensity, Polarization, Pra, Characteristics, Observations, Radio Emissions, Spectrum, Wavelengths, Morphology, Latitude, Geometry, Satellites, Io, Frequency, Data, Comparisons, Flux Density, Shape, Refraction, Models, Patterns, Source Medium

Scientific paper

The paper describes the major observational features of one new component of Jupiter's radio emission spectrum, the broadband kilometer wavelength radiation, or bKOM. This study, using the Voyager Planetary Radio Astronomy (PRA) experiments, reveals that the overall occurrence morphology, dynamic spectra, and polarization character of bKOM are strong functions of the latitude and/or local time geometry of the observations. The postencounter data show a decline in the mean occurrence rates and power level of bKOM and, in particular, a depletion in the occurrence rate at those same longitudes where the detection rate is a maximum before encounter. Additionally, the polarization sense undergoes a permanent reversal in sign after encounter, whereas the time-averaged wave axial ratio and degree of polarization remain relatively unchanged. Finally, no evidence of any control by Io is found. The strong dependence of the morphology on local time suggests a source whose beam is nearly fixed relative to the Jupiter-sun line

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