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Observations of Small-Scale Magnetic Flux Ropes Associated With Significant Values of Partial Variance Increment Indices
Hu, Qiang; Chen, Yu
We report recent findings for the magnetic field configurations of small-scale magnetic flux ropes (SFRs) broadly defined and identified by using the Grad-Shafranov-based techniques for in situ measurements via the Parker Solar Probe (PSP), Solar Orbiter (SolO), and two Helios spacecraft. Since the current sheets were found to occur at boundaries …
VLF Transmitter Signals Observed by the Cluster Spacecraft Over a Wide Range of Latitudes
Santolík, O.; Němec, F.; Albert, J. M.
Very low frequency transmitter signals can penetrate through the ionosphere and propagate in the inner magnetosphere, being observed by spacecraft instruments with sufficient frequency resolution and range. We use 23 years of measurements performed by the Waves of High frequency and Sounder for Probing of Electron density by Relaxation instrument …
Venus' O 5577 Å Oxygen Green Line: A Global Diffuse Proton-Induced Aurora
Tellmann, Silvia; Pätzold, Martin; Peter, Kerstin +5 more
The Venusian O(1S–1D) 5577 Å "oxygen green line" has been an enigmatic feature of the Venusian atmosphere since its first attempted observation by the Venera spacecraft. Its first detection in 1999 and subsequent detections point to a unique auroral phenomena. However, the lack of (1D–3P) 6300 Å "oxygen …
Spectral Structures of Jovian Broadband Kilometric Radiation Revealed by Cassini and Juno
Kurth, W. S.; Píša, D.; Fischer, G. +2 more
Cassini flew past Jupiter in 2000/2001, and Juno has been orbiting the gas giant since mid-2016. Here we focus on the spectral properties of Jovian broadband kilometric radiation (bKOM), and we classified them according to their slope in the time–frequency spectrum and distinguish four categories with negative, positive, mixed, or no slope in freq…