Special issue "VLF/ELF remote sensing of ionospheres and magnetospheres".

This document is a summary of a special issue of the journal Earth, Planets & Space titled "VLF/ELF remote sensing of ionospheres and magnetospheres." The issue is a result of the 9th VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop, which took place virtually in November 2020. The workshop focused on studying the behavior of the magnetosphere and ionosphere using Extremely Low Frequency (ELF) and Very Low Frequency (VLF) radio waves. The special issue includes 13 papers on various topics related to VLF/ELF remote sensing, including spacecraft observations, particle simulations, and technical issues. The authors express their gratitude to the reviewers of the articles and declare no competing interests. The guest editors for the special issue are Yoshiharu Omura, Jacob Bortnik, Mark Clilverd, Andrei Demekhov, and Yohei Miyake. [Extracted from the article]