Statistical Study on L‐O Mode Saturn Kilometric Radiation
Abstract Based on the 13 years‐long observation of Saturn kilometric radiation (SKR) by the Cassini/Radio and Plasma Wave Science instrument, this study derives statistics for left‐hand (L‐O) mode SKR emissions. These emissions span a frequency range from below 10 kHz to approximately 1,000 kHz, wit...
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| Format: | Article |
| Language: | English |
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Wiley
2025-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL114876 |
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| author | Junhao Pan Siyuan Wu Shengyi Ye Georg Fischer Laurent Lamy Philippe Zarka Ulrich Taubenschuss |
| author_facet | Junhao Pan Siyuan Wu Shengyi Ye Georg Fischer Laurent Lamy Philippe Zarka Ulrich Taubenschuss |
| author_sort | Junhao Pan |
| collection | DOAJ |
| description | Abstract Based on the 13 years‐long observation of Saturn kilometric radiation (SKR) by the Cassini/Radio and Plasma Wave Science instrument, this study derives statistics for left‐hand (L‐O) mode SKR emissions. These emissions span a frequency range from below 10 kHz to approximately 1,000 kHz, with spectral flux densities ranging between 10−24 and 10−18 W/(m2 Hz) consistent with, although fainter than, right‐hand mode SKR. Predominantly observed within 20 Saturn radii, the occurrence rates of L‐O mode SKR exhibit a preference below 20° in latitude, and a local time asymmetry with a higher occurrence rate on the dayside. Occurrence maps indicate that low‐frequency (<100 kHz) L‐O mode SKR may be obstructed by the Enceladus plasma torus due to the higher electron density, while high‐frequency (>100 kHz) emissions can pass through unhindered. Additionally, a substantial proportion of high‐latitude L‐O mode emissions exhibit strong elliptical polarization, contrasting with predominantly circular polarization observed at low latitudes. |
| format | Article |
| id | doaj-art-763c253b9f8047ca800659a6c70eb90d |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
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| series | Geophysical Research Letters |
| spelling | doaj-art-763c253b9f8047ca800659a6c70eb90d2025-08-20T03:41:54ZengWileyGeophysical Research Letters0094-82761944-80072025-08-015215n/an/a10.1029/2025GL114876Statistical Study on L‐O Mode Saturn Kilometric RadiationJunhao Pan0Siyuan Wu1Shengyi Ye2Georg Fischer3Laurent Lamy4Philippe Zarka5Ulrich Taubenschuss6Department of Earth and Space Sciences Southern University of Science and Technology Shenzhen PR ChinaDepartment of Earth and Space Sciences Southern University of Science and Technology Shenzhen PR ChinaDepartment of Earth and Space Sciences Southern University of Science and Technology Shenzhen PR ChinaInstitute of Physics University of Graz Graz AustriaLESIA Observatoire de Paris CNRS Université PSL Sorbonne Université Université Paris Cité CNRS Meudon FranceLESIA Observatoire de Paris CNRS Université PSL Sorbonne Université Université Paris Cité CNRS Meudon FranceDepartment of Space Physics Institute of Atmospheric Physics of the Czech Academy of Sciences Prague CzechiaAbstract Based on the 13 years‐long observation of Saturn kilometric radiation (SKR) by the Cassini/Radio and Plasma Wave Science instrument, this study derives statistics for left‐hand (L‐O) mode SKR emissions. These emissions span a frequency range from below 10 kHz to approximately 1,000 kHz, with spectral flux densities ranging between 10−24 and 10−18 W/(m2 Hz) consistent with, although fainter than, right‐hand mode SKR. Predominantly observed within 20 Saturn radii, the occurrence rates of L‐O mode SKR exhibit a preference below 20° in latitude, and a local time asymmetry with a higher occurrence rate on the dayside. Occurrence maps indicate that low‐frequency (<100 kHz) L‐O mode SKR may be obstructed by the Enceladus plasma torus due to the higher electron density, while high‐frequency (>100 kHz) emissions can pass through unhindered. Additionally, a substantial proportion of high‐latitude L‐O mode emissions exhibit strong elliptical polarization, contrasting with predominantly circular polarization observed at low latitudes.https://doi.org/10.1029/2025GL114876SaturnCassiniradio emissionmagnetosphere |
| spellingShingle | Junhao Pan Siyuan Wu Shengyi Ye Georg Fischer Laurent Lamy Philippe Zarka Ulrich Taubenschuss Statistical Study on L‐O Mode Saturn Kilometric Radiation Geophysical Research Letters Saturn Cassini radio emission magnetosphere |
| title | Statistical Study on L‐O Mode Saturn Kilometric Radiation |
| title_full | Statistical Study on L‐O Mode Saturn Kilometric Radiation |
| title_fullStr | Statistical Study on L‐O Mode Saturn Kilometric Radiation |
| title_full_unstemmed | Statistical Study on L‐O Mode Saturn Kilometric Radiation |
| title_short | Statistical Study on L‐O Mode Saturn Kilometric Radiation |
| title_sort | statistical study on l o mode saturn kilometric radiation |
| topic | Saturn Cassini radio emission magnetosphere |
| url | https://doi.org/10.1029/2025GL114876 |
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