Füllekrug, Martin Ferruccio Zanotti William Rison Michel Parrot Alec Bennett József Bór Thomas Farges Ondrej Santolik Ivana Kolmasova Enrico Arnone The high frequency magnetic field measurements from ~5 kHz–40 MHz near Rustrel (RST) show that the second positive lightning discharge (upper panel) exhibits resonant type oscillations with a period of ~3.8 μs (~260 kHz) lasting for ~9 cycles over ~34.2 μs (lower panel) attributed to a bouncing-wave discharge <p><strong>Figure 3.</strong> The high frequency magnetic field measurements from ~5 kHz–40 MHz near Rustrel (RST) show that the second positive lightning discharge (upper panel) exhibits resonant type oscillations with a period of ~3.8 μs (~260 kHz) lasting for ~9 cycles over ~34.2 μs (lower panel) attributed to a bouncing-wave discharge.</p> <p><strong>Abstract</strong></p> <p>The acceleration of electrons results in observable electromagnetic waves which can be used for remote sensing. Here, we make use of ~4 Hz–66 MHz radio waves emitted by two consecutive intense positive lightning discharges to investigate their impact on the atmosphere above a thundercloud. It is found that the first positive lightning discharge initiates a sprite where electrons are accelerated during the exponential growth and branching of the sprite streamers. This preconditioned plasma above the thundercloud is subsequently exposed to a second positive lightning discharge associated with a bouncing-wave discharge. This discharge process causes a re-brightening of the existing sprite streamers above the thundercloud and initiates a subsequent relativistic electron beam.</p> lightning discharge;discharge process causes;thundercloud;electron;sprite streamers;rst;Environmental Science 2013-08-13
    https://iop.figshare.com/articles/figure/_The_high_frequency_magnetic_field_measurements_from_5_kHz_40_MHz_near_Rustrel_RST_show_that_the_sec/1011785
10.6084/m9.figshare.1011785.v1