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Satellite Discharges Linked to Low-Energy Electron Surges, Offering Short Warning Window

Los Alamos sensors on DoD’s STP-Sat6 captured a 24–45 minute lead from 7.9–12.2 keV electron peaks to subsequent discharge events.

Overview

  • A peer-reviewed study in Advances in Space Research reports a direct correlation between spacecraft environment discharges and surrounding electron flux.
  • Co-located instruments on the geostationary STP-Sat6 measured radio-frequency transients alongside electron flux over more than a year.
  • The Los Alamos–built sensors identified over 270 high-rate discharge periods and several hundred episodes of elevated electron activity.
  • Roughly 75% of observed events showed electron peaks preceding discharges, indicating low-energy electrons prime surfaces for breakdowns.
  • The team proposes real-time monitoring and forecasting based on the precursor signal to reduce risks to satellite electronics, with operational tools still to be developed.