Abstract

The results of a numerical simulation of the dynamics of the airglow of the atomic oxygen red line (630 nm) due to ionospheric heating by high-power, high-frequency (HF) radio emission are presented. The simulation was based on a system that incorporates an equation for the electron temperature T_e (thermal conductivity) with a localized heating source near the reflection point of the pump wave; an equation to balance the ion concentration in molecular oxygen \({\text{O}}_{2}^{ + },\) which emerges from the charge exchange reaction (О⁺ + О₂ → \({\text{O}}_{2}^{ + }\) + О); and an equation for the concentration of oxygen atoms in the excited state O(¹D), which results from the dissociative recombination (\({\text{O}}_{2}^{ + }\) + е⁻ → О + О(¹D)) and is responsible for the airglow. The height distributions of molecular (O₂) and atomic (O) oxygen were taken from the NRLMSISE-00 empirical model of the atmosphere, and the profiles of the electron content N_e were taken from the International Reference Ionosphere (IRI) model modified according to the 2010 and 2012 experimental data from the SURA ionospheric heating facility. The results have been compared with experimental data. The calculations make it possible to interpret the experimentally observed suppression of the background airglow during ionospheric heating by a high-power radio wave and the “afterglow” effect upon the cessation of heating.

中文翻译：

---

背景光发射对高功率无线电发射电离层加热的响应

摘要

介绍了由高功率、高频 (HF) 无线电发射引起的电离层加热引起的原子氧红线 (630 nm) 气辉动力学的数值模拟结果。该模拟基于一个系统，该系统将电子温度T _e（热导率）方程与泵波反射点附近的局部加热源结合在一起；平衡分子氧中离子浓度的方程\({\text{O}}_{2}^{ + },\)来自电荷交换反应 (О ⁺ + О ₂ → \({\text{ O}}_{2}^{ + }\) + О); 以及激发态氧原子浓度的方程 O( ¹ D)，这是由解离重组产生的 ( \({\text{O}}_{2}^{ + }\) + е ⁻ → О + О( ¹ D )) 并且负责气辉。分子 (O ₂ ) 和原子 (O) 氧的高度分布取自 NRLMSISE-00 大气经验模型，以及电子含量N _{e 的分布图}取自根据 SURA 电离层加热设施的 2010 年和 2012 年实验数据修改的国际参考电离层 (IRI) 模型。结果与实验数据进行了比较。这些计算可以解释实验观察到的高功率无线电波在电离层加热期间对背景气辉的抑制以及加热停止时的“余辉”效应。