Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2011-11-21
Planetary Radio Emissions VII, H. O. Rucker, W. S. Kurth, P. Louarn, G. Fischer (eds.), Austrian Academy of Sciences Press, Vi
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
10 pages, 6 figures, 2 tables; Proc. PRE VII conference Graz Sept. 2010
Scientific paper
The lightning activity in Saturn's atmosphere has been monitored by Cassini for more than six years. The continuous observations of the radio signatures called SEDs (Saturn Electrostatic Discharges) combine favorably with imaging observations of related cloud features as well as direct observations of flash-illuminated cloud tops. The Cassini RPWS (Radio and Plasma Wave Science) instrument and ISS (Imaging Science Subsystem) in orbit around Saturn also received ground-based support: The intense SED radio waves were also detected by the giant UTR-2 radio telescope, and committed amateurs observed SED-related white spots with their backyard optical telescopes. Furthermore, the Cassini VIMS (Visual and Infrared Mapping Spectrometer) and CIRS (Composite Infrared Spectrometer) instruments have provided some information on chemical constituents possibly created by the lightning discharges and transported upward to Saturn's upper atmosphere by vertical convection. In this paper we summarize the main results on Saturn lightning provided by this multi-instrumental approach and compare Saturn lightning to lightning on Jupiter and Earth.
Barry Tiffany
Delcroix Marc
Dyudina Ulyana A.
Fischer Guntram
Go Christopher
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