Monitoring the Earth's radiation belt by Low-Earth-Orbit (LEO) satellites has a long history and complemented observations near the high-altitude equatorial plane. However, most of the previous LEO missions suffered from limitations in energy resolution, energy range, L-shell coverage, or the mission lifetime, which leave room for further improvement in this topic. For <80 keV electrons, the slot-region outer edge at LEO moves inward with increasing geomagnetic activity, which agrees with previous Van Allen Probes reports. The behavior is more conspicuous for lower-energy electrons. Latitudinal profiles of outer-belt electron flux are smoother equatorward of the geosynchronous footprint latitudes (|MLAT| ∼ 66°) than poleward. The NextSat-1 electron flux is positively correlated to geosynchronous observations, with the coefficient generally higher for higher electron energies. Also, both the geosynchronous and NextSat-1 data exhibit similar spectral indices close to −3 in the log-log space. All these results complement and expand previous knowledge on energetic electrons. The main findings are discussed in the context of existing literature.

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韩国 NextSat-1 观测到的 LEO 高能电子多年统计数据

低地球轨道 (LEO) 卫星监测地球辐射带的历史悠久，并补充了高空赤道平面附近的观测。然而，之前的大多数 LEO 任务都受到能量分辨率、能量范围、L-shell 覆盖范围或任务生命周期，这为该主题的进一步改进留下了空间。对于 <80 keV 电子，LEO 的槽区外边缘随着地磁活动的增加而向内移动，这与之前的 Van Allen Probes 报告一致。对于低能电子，这种行为更为明显。外带电子通量的纬度剖面在地球同步足迹纬度（|MLAT| ∼ 66°）的赤道方向比极地更平滑。NextSat-1 电子通量与地球同步观测呈正相关，电子能量越高，该系数通常越高。此外，地球同步数据和 NextSat-1 数据在对数对数空间中都表现出接近 -3 的相似光谱指数。所有这些结果补充和扩展了先前关于高能电子的知识。