The Radio Wave Polarization of Saturn Lightning Observed by Cassini
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F25%3A00636307" target="_blank" >RIV/68378289:_____/25:00636307 - isvavai.cz</a>
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JA033560" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JA033560</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024JA033560" target="_blank" >10.1029/2024JA033560</a>
Alternative languages
Result language
angličtina
Original language name
The Radio Wave Polarization of Saturn Lightning Observed by Cassini
Original language description
We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz depends on the latitudinal hemisphere of the lightning storm. SEDs from several storms located at 35 degrees $35{}<^>{circ}$ South latitude display a strong right-hand sense of circular polarization, whereas SEDs from storms located at 35 degrees $35{}<^>{circ}$ and 50 degrees $50{}<^>{circ}$ North are overwhelmingly left-hand polarized. A single storm located at Saturn's equator in June 2005 shows 4 right-handed SEDs when Cassini was in the northern hemisphere and 4 left-handed SEDs when Cassini was in the southern hemisphere. The polarization characteristic is consistent with an emission in the L-O mode, consistent with the theory of Fischer, Gurnett, et al. (2007, JGR 112, A12308, ) that the R-X mode is largely absorbed in Saturn's ionosphere below a frequency of 2 MHz. The sense of circular SED polarization below 2 MHz is opposite to the polarization of Saturn kilometric radiation (SKR), and thus this can be used to distinguish SEDs from SKR and to determine the hemispherical origin of the causative lightning storm.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/GF24-11046L" target="_blank" >GF24-11046L: Open questions about Saturn's radio emissions</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Space Physics
ISSN
2169-9380
e-ISSN
2169-9402
Volume of the periodical
130
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
e2024JA033560
UT code for WoS article
001503610500001
EID of the result in the Scopus database
2-s2.0-105007622001