Goniopolarimetric study of the revolution 29 perikrone using the Cassini Radio and Plasma Wave Science instrument high-frequency radio receiver

Baptiste Cecconi; Laurent Lamy; Philippe Zarka; Renée Prangé; William S. Kurth; Philippe Louarn

doi:10.1029/2008JA013830

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Goniopolarimetric study of the revolution 29 perikrone using the Cassini Radio and Plasma Wave Science instrument high-frequency radio receiver

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Goniopolarimetric study of the revolution 29 perikrone using the Cassini Radio and Plasma Wave Science instrument high-frequency radio receiver

Baptiste Cecconi, Laurent Lamy, Philippe Zarka, Renée Prangé, William S. Kurth and Philippe Louarn

Journal of geophysical research. Space physics, Vol.114(A3), pp.A03215-n/a

05/01/2009

DOI: 10.1029/2008JA013830

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Abstract

We present goniopolarimetric (also known as direction finding) results of the Saturn kilometric radiation (SKR), using the Cassini Radio and Plasma Wave Science instrument high-frequency radio receiver data. Tools to retrieve the characteristics of the SKR sources have been developed that allow us to measure their 3-D location and beaming angle relative to the magnetic field in the source and, thus, to deduce the location of the footprints of the active magnetic field lines. We present results from these analyses on SKR observed during the revolution 29 perikrone (25-26 September 2006) with a relatively high orbital inclination. These results provide for the first time the observed beaming angle, the invariant latitude, and the local time of the SKR sources. We provide evidence that the SKR is mainly emitted in the right-hand extraordinary (R-X) mode and marginally in the left-hand ordinary (L-O) mode. We observe the footprint of the active magnetic field lines in the ~70° to ~80° northern and southern latitudinal range and in the 0400 to 1600 local time range. The northern sources are observed at slightly higher latitude than southern sources. The location matches that of the UV and IR aurorae. Duskside and nightside sources are also detected.

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Physics

Details

Title: Subtitle: Goniopolarimetric study of the revolution 29 perikrone using the Cassini Radio and Plasma Wave Science instrument high-frequency radio receiver
Creators: Baptiste Cecconi - Délégation Paris 7
Laurent Lamy - Laboratoire d’études spatiales et d’instrumentation en astrophysique
Philippe Zarka - Laboratoire d’études spatiales et d’instrumentation en astrophysique
Renée Prangé - Délégation Paris 7
William S. Kurth - University of Iowa
Philippe Louarn - Centre d'étude spatiale des rayonnements
Resource Type: Journal article
Publication Details: Journal of geophysical research. Space physics, Vol.114(A3), pp.A03215-n/a
DOI: 10.1029/2008JA013830
ISSN: 2169-9380
eISSN: 2169-9402
Publisher: American Geophysical Union/Wiley
Language: English
Date published: 05/01/2009
Academic Unit: Physics and Astronomy
Record Identifier: 9984455365402771

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