释放化学物质耗空电离层电子密度的研究

电离层作为电波传播的主要通道和载体,影响着无线电通信的质量,因此人工电离层扰动具有广阔的应用前景,在电离层中释放具有较强电子亲和力的化学物质可以耗空电离层F区的电子密度,是人工电离层扰动的有效手段之一.本文通过对CO2和SF6气体在电离层中的扩散和离子化学反应过程的分析,理论计算了在我国北京地区上空释放这两种气体后电离...

Ionosphere electron density depletion caused by chemical release

The propagation of radiowaves can be affected by the ionosphere plasma parameters, such as electron density, so active ionospheric modification has a wide application prospect in military use. Release of a chemically reactive gas into the ionospheric F-region can result in the depletion of electron density. In terms of diffusion process of neutral gas and relevant chemical reactions in the ionosphere, the theoretical model of ionospheric modification is investigated in this paper. The influences of CO₂ and SF₆ gas on the ionosphere of Beijing area are theoretically calculated respectively. The results show that: (1) The localized electron density depletion in F-regions is remarkable after release of 100 kg CO₂ or SF₆ gas, it can form an ionospheric hole which can persist for hours. (2) Compared to CO₂ gas, SF₆ gas has slow diffusion speed and large chemical reaction rates, so it will substantially affect ionosphere and facilitate the formation of artificial ionospheric hole.