Satellite Internal Charging for a Reasonable Worst‐Case

Horne, R.B. ORCID: https://orcid.org/0000-0002-0412-6407; Lam, P.Y.; Meredith, N.P. ORCID: https://orcid.org/0000-0001-5032-3463; Glauert, S.A. ORCID: https://orcid.org/0000-0003-0149-8608; Kirsch, P. ORCID: https://orcid.org/0000-0003-2482-0217. 2025 Satellite Internal Charging for a Reasonable Worst‐Case. Space Weather, 23 (6), e2024SW004226. 15, pp. 10.1029/2024SW004226

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.102...

Abstract/Summary

Increases in the flux of high energy electrons in the Earth's radiation belts cause satellite charging which can lead to an electrostatic discharge, anomalies and disruption to service. For geostationary orbit (GEO) there are guidelines on how much shielding to protect electronic components, but not for lower orbits. Here we use data from GPS satellite NS41, the AE9 radiation model, and LANL satellite data to create a reasonable worst-case electron flux spectrum between 60 keV and 8 MeV. We calculate the charging currents for satellites in circular equatorial orbit between 4.25 and 7.0 Re and show that the recommended guideline of 2.8 mm (110 mil) of Al shielding is sufficient to keep charging below recommended guidelines at GEO. Approximately 4.5 mm (177 mil) of Al shielding would be needed for satellites in circular equatorial orbit at 4.5 Re. We show that the maximum electric field could exceed the breakdown field in cables and dielectrics just under the spacecraft surface on a timescale of 1–2 hr presenting a risk of anomalies. Radiation induced conductivity reduces the risk but is highly uncertain. A magnetic storm, series of storms or high speed stream accompanied by a large solar energetic particle event would present a much higher risk of anomalies on several satellites.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2024SW004226
ISSN:	1542-7390
Additional Keywords:	satellite charging, internal charging, severe space weather, surface charging, reasonable worst case
Date made live:	16 Jun 2025 08:43 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/539595

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1029/2024SW004226

ISSN:

1542-7390

Additional Keywords:

satellite charging, internal charging, severe space weather, surface charging, reasonable worst case

Date made live:

16 Jun 2025 08:43 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/539595