Forecasting relativistic electron fluxes at geostationary Earth orbit (GEO) has been a long‐term goal of the scientific community, and significant advances have been made in the past, but the relation to the interior of the radiation belts, that is, to lower L‐shells, is still not clear. In this work we have identified 60 relativistic electron enhancement events at GEO to study the radial response of outer belt fluxes and the correlation between the fluxes at GEO and those at lower L‐shells. The enhancement events occurred between 1 October 2012 and 31 December 2017 and were identified using Geostationary Operational Environmental Satellite (GOES) 15 >2 MeV fluxes at GEO, which we have used to characterize the radial response of the radiation belt, by comparing to fluxes measured by the Van Allen probes Energetic Particle, Composition and Thermal Plasma Suite Relativistic Electron‐Proton Telescope (ECT‐REPT) between 2.5<L<6.0 at E=2.1 MeV. We have found that in general the response of the radiation belts during enhancement events is cohesive for L>5.0 and generally similar for L>4.5. Post‐enhancement maximum fluxes show a remarkable correlation for all L>4.0 although the magnitude of the pre‐existing fluxes on the outer belt plays a significant role and makes the ratio of pre‐enhancement to post‐enhancement fluxes less predictable in the region 4.0<L<4.5. For L<4 the fluxes are poorly correlated with geostationary orbit, but they also tend to be less variable. We have also examined SYM‐H, Kp, and AE indices and found that depending on their magnitude, the response of different parts of the outer belt can be better quantified.

中文翻译：

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地球静止轨道增强事件期间外辐射带相对论电子的径向响应

预测对地静止地球轨道（GEO）的相对论电子通量是科学界的长期目标，并且在过去取得了重大进展，但是与辐射带内部的关系，即降低L贝壳，目前还不清楚。在这项工作中，我们确定了GEO处的60个相对论电子增强事件，以研究外带通量的径向响应以及GEO处和较低L处的通量之间的相关性。贝壳。增强事件发生在2012年10月1日至2017年12月31日之间，是通过对地静止轨道上的地球静止运行环境卫星（GOES）15> 2 MeV通量确定的，我们通过与测得的通量进行比较来表征辐射带的径向响应由Van Allen探针在E = 2.1 MeV时，在2.5 < L <6.0的范围内，高能粒子，成分和热等离子体套件相对论电子质子望远镜（ECT-REPT）。我们发现，一般而言，增强事件期间辐射带的响应具有内聚性，适用于L > 5.0，而对于L > 4.5则通常相似。增强后的最大通量对于所有L均显示出显着的相关性> 4.0，尽管外带上预先存在的通量的大小起着重要作用，并且在4.0 < L <4.5的区域内，增强前通量与增强后通量之比很难预测。对于L <4，通量与对地静止轨道的相关性很差，但它们的可变性也较小。我们还检查了S Y M ‐ H，K p和A E指数，发现根据它们的大小，可以更好地量化外带不同部分的响应。