Influence of January 2009 stratospheric warming on HF radio wave propagation in the low-latitude ionosphere

Solar-Terrestrial Physics

Kotova Daria Sergeevna¹ 

关键词: Sudden stratospheric warming;    HF radio communication;    Radio signal attenuation;    Equatorial ioni-zation anomaly;    3D modeling;   

DOI  :  10.12737/24275

学科分类：天文学(综合)

来源: INFRA-M

【 摘 要 】

We have considered the influence of the January 23–27, 2009 sudden stratospheric warming (SSW) event on HF radio wave propagation in the equatorial ionosphere. This event took place during extremely low solar and geomagnetic activity. We use the simulation results obtained with the Global Self-consistent Model of the Thermosphere, Ionosphere and Protonosphere (GSM TIP) for simulating environmental changes during the SSW event. We both qualitatively and quantitatively reproduced total electron content disturbances obtained from global ground network receiver observations of GPS navigation satellite signals, by setting an additional electric potential and TIME-GCM model output at a height of 80 km. In order to study the influence of this SSW event on HF radio wave propagation and attenuation, we used the numerical model of radio wave propagation based on geometrical optics approximation. It is shown that the sudden stratospheric warming leads to radio signal attenuation and deterioration of radio communication in the daytime equatorial ionosphere.

【 授权许可】

CC BY-NC-ND