Physics – Plasma Physics
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..569m&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 5, p. 569-572
Physics
Plasma Physics
4
Magnetospheric Physics: Planetary Magnetospheres, Magnetospheric Physics: Plasma Waves And Instabilities, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
Galileo has been in orbit around Jupiter since December 1995. All the orbits are equatorial and elliptical, with apogees between 60Rj-142Rj, and perigees from 8-12Rj. Since orbit injection, the plasma wave instrument (PWS) has been collecting data over specific intervals of each of the orbits at all local times and a range of different radial distances. We present the results of a survey of the data for the frequency range 300 kHz to 5.6 MHz, which includes the hectometric (HOM) and low-frequency decametric (DAM) emissions. The results indicate that both the HOM and DAM emission are more intense and occur more frequently in the midnight sector of Jupiter. This is in analogy to Earth and consistent with a magnetic substorm source for a portion of the radio emissions in this frequency range. Another peak in the power levels is observed on the Jovian dayside in the local time range 11hrs.
Groene Joseph B.
Gurnett Donald A.
Kurth Willaim S.
Menietti Douglas J.
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