Radio Jupiter after Voyager - an overview of the planetary radio astronomy observations

Details Radio Jupiter after Voyager - an overview of the planetary radio astronomy observations Radio Jupiter after Voyager - an overview of the planetary radio astronomy observations

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.8213b&link_type=abstract

Journal of Geophysical Research, vol. 86, Sept. 30, 1981, p. 8213-8226. Research supported by the Centre National d'Etudes Spat

Astronomy and Astrophysics

Astronomy

70

Jupiter (Planet), Planetary Radiation, Radio Astronomy, Radio Emission, Voyager 1 Spacecraft, Voyager 2 Spacecraft, Cosmic Plasma, Frequency Response, Io, Power Spectra, Radio Observation, Spacecraft Instruments, Toroidal Plasmas, Jupiter, Radioemissions, Voyager, Radio Astronomy, Pra, Observations, Planetary Radio Astronomy Instrument, Kilometer Waves, Decameter Waves, Wavelengths, Hectometer Waves, Structure, Morphology, Satellites, Io, In-Situ Measurements, Plasma Torus, Electrons, Density, Temperatures,

Scientific paper

An overview of Jupiter's low-frequency radio emission morphology as observed by the planetary radio astronomy (PRA) instrument onboard the Voyager spacecraft is presented. The PRA measurement capabilities and limitations are summarized, based on over two years of experience with the instrument. As a direct consequence of the PRA spacecraft observations, unprecedented in terms of their sensitivity and frequency coverage, at least three previously-unrecognized emission components have been discovered: broadband and narrow-band kilometric emission, and the lesser-arc decametric emission. Their properties are reviewed. In addition, the fundamental structure of the decameter wavelength and hectometer wavelength emission, now believed to be almost exclusively in the form of complex but repeating arc structures in the frequencytime domain, is described. Dramatic changes in the emission morphology of some components as a function of the sun-Jupiter-spacecraft angle (local time) are described. Finally, the PRA in situ measurements of the Io plasma torus hot-to-cold electron density and temperature ratios are summarized.

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