Source characteristics of Jovian narrow-band kilometric radio emissions

Details Source characteristics of Jovian narrow-band kilometric radio emissions Source characteristics of Jovian narrow-band kilometric radio emissions

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9813163r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E7, p. 13,163-13,176.

Physics

26

Jupiter Atmosphere, Kilometric Waves, Long Wave Radiation, Planetary Radiation, Circular Polarization, Io, Narrowband, Polarized Electromagnetic Radiation, Toroidal Plasmas, Ulysses Mission, Jupiter, Source, Origin, Kilometer Waves, Radiowaves, Emissions, Io, Spacecraft Observations, Ulysses Mission, Urap Instrument, Longitude, Satellites, Plasma Torus, Latitude, Polarization, Spectra, Analysis, Equipment, Intensity, Comparison, Position (Location), Parameters, Evolution

Scientific paper

New observations of Jovian narrow-band kilometric (nKOM) radio emissions were made by the Unified Radio and Plasma Wave (URAP) experiment on the Ulysses spacecraft during the Ulysses-Jupiter encounter in early February 1992. These observations have demonstrated the unique capability of the URAP instrument for determining both the direction and polarization of nKOM radio sources. An important result is the discovery that nKOM radio emission originates from a number of distinct sources located at different Jovian longitudes and at the inner and outermost regions of the Io plasma torus. These sources have been tracked for several Jovian rotations, yielding their corotational lags, their spatial and temporal evolution, and their radiation characteristics at both low latitudes far from Jupiter and at high latitudes near the planet. Both right-hand and left-hand circularly polarized nKOM sources were observed. The polarizations observed for sources in the outermost regions of the torus seem to favor extraordinary mode emission.

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