Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm41b1680k&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM41B-1680
Physics
2704 Auroral Phenomena (2407), 2756 Planetary Magnetospheres (5443, 5737, 6033), 2772 Plasma Waves And Instabilities (2471), 5706 Aurorae
Scientific paper
A primary objective of the Juno mission is to explore the polar magnetosphere of Jupiter. While Ulysses briefly attained latitudes of ~48 degrees, this was at relatively large distances from Jupiter (~8.6 RJ). Hence, the polar magnetosphere of Jupiter is largely uncharted territory and, in particular, the auroral acceleration region has never been visited. Juno's mission includes ~30 orbits of Jupiter with inclination of 90 degrees and a perijove between the atmosphere and the rings at low latitudes. The auroral suite of instruments on Juno includes a Waves investigation designed to explore the plasma wave and radio wave emissions associated with Jupiter's polar magnetosphere, and, especially, the auroral acceleration region. The Juno Waves instrument utilizes a short electric dipole antenna and a body-mounted search coil magnetometer that will enable an initial reconnaissance of the plasma waves important in accelerating auroral charged particles and identifying in situ the sources of hectometric and decametric radio emissions. The instrument will survey the magnetic component of waves from 50 Hz to 20 kHz and will cover the range from 50 Hz to above 40 MHz for the electric component. During the 6 hours centered on perijove, the instrument will collect complete electric and magnetic spectra with at a cadence of one spectrum per second. The instrument also has a burst capability that can be triggered to collect waveforms from 50 Hz to 150 kHz and a 1 MHz band including the electron cyclotron frequency. Also, the new viewing geometry of the various radio emissions coupled with modeling [e.g. Hess et al., J. Geophys. Res., in press, 2008] should allow the identification of radio source locations and extent far better than achieved up to now.
Bolton Scott
Ergun Robert
Gurnett Donald A.
Hospodarsky George B.
Kirchner Donald L.
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