- 1Institut für Weltraumforschung, Extraterrestrial Physics, Graz, Austria (mohammed.boudjada@oeaw.ac.at)
- 2LATMOS-CNRS, UVSQ Université Paris-Saclay, Guyancourt, France
We analyze the electric field measurements recorded by the radio and plasma wave experiment (RPWS) onboard Cassini spacecraft. This mission has been designed to study mostly plasma waves and radio emissions in the environment of Saturn (Galopeau et al., 2007). RPWS instrument allowed to investigate Saturnian magnetosphere and its vicinity over a frequency range from 1 Hz to 16 MHz. RWPS dynamic spectra displayed the Type II radio intensity variation (in dB) versus the frequency (in kHz) and the observation time (in UT). The daily spectral features are principally linked to the periodic modulation of Saturnian Kilometric Radiation (SKR) emissions. Despite the huge distance (~ 1.5 109 km) between the Sun and Saturn, this experiment detected Solar Type III radio bursts superposed to SKR planetary rotations (Boudjada et al., 2023). In this work, we investigate Type III bursts recorded from the beginning of January 2004 to the end of August 2017. Three aspects are addressed and developed taking into consideration Type III spectral shapes: (a) the high level of radio intensity (saturated emission) despite the distance Sun-Saturn, (b) the presence of Faraday fringes over a bandwidth of few MHz, and (c) the particular features when the local time occurrence is close to midday or midnight. Those aspects allow us to characterize the physical processes which happen to the Solar Type III emission, propagating in different plasma environment, from the generation region (i.e., Solar corona) and up to the Saturn’s magnetosphere.
References:
Boudjada et al., Statistical analysis of Solar Type III radio bursts observed by RPWS experiment in 2004-2017 during the Solar cycles 23-24. In Proceedings Kleinheubach Conference, Ed. U.R.S.I. Landesausschuss in Deutschland e.V., IEEE, Miltenberg, 2023.
Galopeau et al., Spectral features of SKR observed by Cassini/RPWS: Frequency bandwidth, flux density and polarization. Journal of Geophysical Research, 112, A11, 2007.
How to cite: Boudjada, M. Y., Galopeau, P. H. M., Lammer, H., Eichelberger, H. U., Voller, W., and Stachel, M.: Case study of Solar Type III radio bursts recorded in the environment of Saturn’s magnetosphere , EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-9112, https://doi.org/10.5194/egusphere-egu25-9112, 2025.
