We report on the results of studying the radio emission of the Rydberg states of atoms and molecules in the Earth’s upper atmosphere at ionospheric altitudes when the ionosphere is modified by high-power HF radio waves radiated by the Sura heating facility. Radio emission from the upper atmosphere, caused by the emission of highly excited Rydberg atoms and molecules with the principal quantum number n = 163–169 and n = 225 (decimeter wavelength range) and two spectral features that coincide with the frequencies of transitions between Rydberg states m = 169 → n = 168 with the transition frequency ν n = 1375.35 MHz and m = 166 → n = 165 with ν n = 1451.5 MHz were detected. Characteristic altitudes of the Rydberg radiation generation region were 150–250 km. The radio emission intensity corresponds to 10–45 K, which is comparable with the intensity of the radio emission generated during solar flares.

中文翻译：

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高功率高频无线电波修改的里德堡原子在高层大气中的无线电发射

我们报告了当电离层被 Sura 加热设施辐射的高功率 HF 无线电波修改时，研究地球上层大气中原子和分子在电离层高度的里德堡状态的无线电发射的结果。来自高层大气的无线电发射，由主要量子数 n = 163–169 和 n = 225（分米波长范围）以及与里德堡之间跃迁频率一致的两个光谱特征的高度激发的里德堡原子和分子的发射引起检测到状态 m = 169 → n = 168，过渡频率 ν n = 1375.35 MHz 和 m = 166 → n = 165，ν n = 1451.5 MHz。里德堡辐射发生区的特征海拔高度为 150-250 公里。无线电发射强度对应于 10–45 K，