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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >LEEM: A new empirical model of radiation-belt electrons in the low-Earth-orbit region
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LEEM: A new empirical model of radiation-belt electrons in the low-Earth-orbit region

机译：LEEM:辐射带的新经验模型电子的数量的近地区域

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摘要

A new empirical model of radiation-belt electrons in the low-Earth-orbit region has been developed based upon decade-long in situ observations from several low-altitude-orbiting satellites. This modelLEEMaims to provide the electron environment conditions that a satellite would encounter in a given low Earth orbit. This model presents electron flux values for five energy ranges (0.03-2.5MeV, 0.1-2.5MeV, 0.3-2.5MeV, 1.5-6MeV, and 2.5-14MeV) within the space below an altitude of ～600km. Compared to the de-facto standard empirical model of AE-8, this model not only has a better data coverage in this specific region, but also can provide statistical information on flux levels such as worst cases and occurrence percentiles instead of solely mean values. The comparison indicates that the AE-8 model not only highly overpredicts the fluxes in the inner belt region in most cases, especially for the MeV electrons, which cannot be accounted for by the widely quoted error factor of 2 for AE-8, but also is unable to reflect the observed orders of magnitude variations in electron intensities. The LEEM model is carefully validated with both in-sample and out-of-sample tests. The characteristic electron environments along the International Space Station track and other virtual orbits are given as examples and as a demonstration of the use of the model.
机译：一个新的电子辐射带的经验模型在数量的近地区域基于十年的原位观测几个low-altitude-orbiting卫星。modelLEEMaims提供的电子环境卫星将遇到的条件低地球轨道。电子通量值五能量范围(0.03 - -2.5兆电子伏,0.1 - -2.5伏,0.3 -2.5兆电子伏,1.5 6兆电子伏,和2.5 -14伏)在空间低于海拔~ 600公里。AE-8的实证模型,这个模型不仅更好的数据覆盖在这个特定区域,还可以提供统计信息通量水平最坏情况和发生等百分位数,而不是仅仅意味着值。比较表明,不仅AE-8模型高度overpredicts内部辐射带的通量在大多数情况下,特别是兆电子伏电子,不能占的AE-8广泛引用误差因子2,但是也无法反映了观察到的订单级电子强度的变化。LEEM模型是仔细验证样本内和样本外测试。电子环境的特征国际空间站跟踪和其他虚拟轨道为例,给出演示的使用模型。

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