Unexpected space weather causing the reentry of 38 Starlink satellites in February 2022

This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.

Downloads

Download Preprint

Authors

RYUHO KATAOKA , Daikou Shiota, Hitoshi Fujiwara, Hidekatsu Jin, Chihiro Tao, Hiroyuki Shinagawa, Yasunobu Miyoshi

Abstract

The accidental reentry of 38 Starlink satellites occurred in early February, 2022, associated with the occurrence of moderate magnetic storms. Poorly understood structure of coronal mass ejections (CMEs) caused the magnetic storms at unexpected timing. Better understanding of minor CME structures is therefore necessary for modern space weather forecast. The "up to 50%" enhancement of air drag force was observed at ~200 km altitude, preventing the satellites from their safety operations. Although the mass density enhancement predicted by the NRLMSIS2.0 empirical model is less than 25 % under the present moderate magnetic storms, the real-time GAIA simulation showed the mass density enhancement of up to 50%. Further, the GAIA simulation suggests that the actual thermospheric disturbances at 200 km altitude may occur with larger amplitude in the wider area than previously thought.

DOI

https://doi.org/10.31223/X5GH0X

Subjects

Physical Sciences and Mathematics

Keywords

coronal mass ejections, magnetic storms, satellite drag

Dates

Published: 2022-03-25 14:47

Last Updated: 2022-03-25 14:47

License

CC BY Attribution 4.0 International

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.