Journal article
High spectral and temporal resolution observations of Saturn kilometric radiation
Geophysical research letters, Vol.32(20), L20S07
10/2005
DOI: 10.1029/2005GL022648
Abstract
This paper presents the first high-resolution dynamic spectra of Saturn kilometric radiation acquired upon Cassini's approach and first orbits of Saturn. The emissions display upward and downward drifting features with bandwidths down to ~200 Hz and drift rates of a few kHz per second. At other times, the emissions are much more diffuse or continuous, showing little spectral structure on scales of 10 or 20 kHz. The fine structure is strikingly similar to Earth's auroral kilometric radiation (AKR) and Jovian auroral radio emissions in many respects. The dynamic spectral features provide insight into the highly nonlinear nature of the cyclotron maser instability believed to generate the emissions. We use ideas developed to explain the fine structures at Earth to suggest features and processes in the auroral acceleration region which may result in Saturn's fine structures.
Details
- Title: Subtitle
- High spectral and temporal resolution observations of Saturn kilometric radiation
- Creators
- William S. Kurth - Iowa State UniversityGeorge B. Hospodarsky - Iowa State UniversityDonald A. Gurnett - Iowa State UniversityBaptiste Cecconi - Iowa State UniversityPhilippe Louarn - Centre d'étude spatiale des rayonnementsAlain Lecacheux - Observatoire de ParisPhilippe Zarka - Observatoire de ParisHelmut O. Rucker - AkademieMohammed Y. Boudjada - AkademieMichael L. Kaiser - NASA/Goddard Space Flight Center
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.32(20), L20S07
- Publisher
- American Geophysical Union
- DOI
- 10.1029/2005GL022648
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Language
- English
- Date published
- 10/2005
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455658702771
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