ULYSSES radio and plasma wave observations in the Jupiter environment

Details ULYSSES radio and plasma wave observations in the Jupiter environment ULYSSES radio and plasma wave observations in the Jupiter environment

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sci...257.1524s&link_type=abstract

Science (ISSN 0036-8075), vol. 257, no. 5076, Sept. 11, 1992, p. 1524-1531. Research supported by CNES and INSU.

Astronomy and Astrophysics

Astronomy

71

Jupiter (Planet), Planetary Magnetospheres, Plasma Waves, Radio Waves, Ulysses Mission, Auroras, Io, Radio Sources (Astronomy), Thermal Noise, Voyager Project, Whistlers

Scientific paper

The Unified Radio and Plasma Wave (URAP) experiment has produced new observations of the Jupiter environment, owing to the unique capabilities of the instrument and the traversal of high Jovian latitudes. Broad-band continuum radio emission from Jupiter and in situ plasma waves have proved valuable in delineating the magnetospheric boundaries. Simultaneous measurements of electric and magnetic wave fields have yielded new evidence of whistler-mode radiation within the magnetosphere. Observations of auroral-like hiss provided evidence of a Jovian cusp. The source direction and polarization capabilities of URAP have demonstrated that the outer region of the Io plasma torus supported at least five separate radio sources that reoccurred during successive rotations with a measurable corotation lag. Thermal noise measurements of the Io torus densities yielded values in the densest portion that are similar to models suggested on the basis of Voyager observations of 13 years ago. The URAP measurements also suggest complex beaming and polarization characteristics of Jovian radio components. In addition, a new class of kilometer-wavelength striated Jovian bursts has been observed.

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