Near-Approach Imaging Simulation of Low-Altitude ENA Emissions by a LEO Satellite

• DOI: 10.3389/fspas.2020.00035
• Publication Date: 2020-07-21T07:49:28Z
• Authors: Li Lu; Qing-Long Yu; Qi Lu
• Keywords: Substorm; Polar orbit; Orbit (dynamics)

We simulate a 2-D ENA coded modulation imager on board polar orbit satellite. An imaging measurement, which can realize continuous monitoring of low-altitude emission sources, is applied to the evolution process energetic ion events. The present simulation results show that: (1) Low earth satellites approach sources from inside and outside inner radiation belt. At low altitude, images be collected with time resolution only 5 seconds, enabling for first observe events, top determining global distribution pattern ions; (2) For tracing particle trigger source substorm, propagation distance particles calculated by using difference energy spectrum response different channels; (3) Due proximity source, will respond medium small-magnitude signals substorms, help sample collection statistical analysis massive data under various geomagnetic activities, provide important support space weather forecasts.