Non Detection of Lightning During the Second Parker Solar Probe Venus Gravity Assist

Author
Keywords
Abstract
The Parker Solar Probe (PSP) spacecraft completed its second Venus gravity assist maneuver (VGA2) on December 26, 2019. For a 20 min interval surrounding closest approach, the PSP/FIELDS Radio Frequency Spectrometer (RFS) was set to "burst mode," recording radio spectra from 1.3 to 19.2 MHz at sub second cadence. We analyze this burst mode data, searching for signatures of radio frequency "sferic" emission from lightning discharges. During the burst mode interval, only four spectra were observed with strong impulsive signals, and all four could be attributed to saturation of the RFS high gain stage by in situ electrostatic plasma waves. These RFS measurements during VGA2 are consistent with previous non detection of radio frequency lightning signals from Venus reported by Gurnett et al. (2001, <A href="https://doi.org/10.1038/35053009">https://doi.org/10.1038/35053009</A>).
Year of Publication
2021
Journal
Geophysical Research Letters
Volume
48
Number of Pages
e91751
Date Published
04/2021
ISSN Number
0094-8276
URL
https://ui.adsabs.harvard.edu/abs/2021GeoRL..4891751P
DOI
10.1029/2020GL091751