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从Boltzmann方程出发,根据带电粒子在中性大气中的传输理论,综合考虑弹性散射、激发、离化以及二次电子生成等重要物理过程,用数值方法求解沉降电子传输方程,获得随高度、能量和投掷角变化的微分沉降电子数通量.在单成分(N2)大气近似条件下,模式计算结果较好地描述了沉降电子通量谱在极区高层大气中的传输规律和特性;由沉降电子微分通量计算得到的中性成分电离率主要特征与已有经验模式较好地吻合.将FAST卫星飞越EISCAT雷达上空时观测到的沉降电子能谱作为模式输入,计算获得了与由雷达观测数据反演得到的中性大气电离率相一致的结果.
Based on the Boltzmann equation, based on the transmission theory of charged particles in the neutral atmosphere, the important physical processes such as elastic scattering, excitation, ionization and secondary electron generation are comprehensively considered. The settlement electron transport equation is solved numerically, And throwing angle variation of differential settlement electronic fluxes in the single component (N2) atmospheric approximation conditions, the pattern calculation results better describe the deposition of electron flux spectra in the polar region atmosphere of the transmission rules and characteristics; by the settlement The main characteristics of the ionization rate of neutral component calculated by electronic differential fluxes are in good agreement with the existing empirical models.The input ESS spectra of FAST satellite over the EISCAT radar are input as the model input, Data inversion results are consistent with the neutral atmospheric ionization rate.