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首页> 外文期刊>Radio Science >Radio monitoring of dynamic processes in the ionosphere over China during the partial solar eclipse of 11 August 2018
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Radio monitoring of dynamic processes in the ionosphere over China during the partial solar eclipse of 11 August 2018

机译：对2018年8月11日部分日食期间中国电离层动态过程的无线电监测

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摘要

We briefly describe the multifrequency multiple-path radio system and illustrate its observational capabilities by performing, as an example, the study of dynamic processes that occurred in the ionosphere over China during the partial solar eclipse on August 11 2018. This system, based on the software-defined radio technology and capable of operating in the 10-kHz to 30-MHz band, has been developed jointly by Harbin Engineering University, the People's Republic of China, where it is located, and V. N. Karazin National University, Ukraine. The principle of the system operation is based on measurements of a Doppler shift of frequency. The implementation of Marple's algorithm for autoregression spectrum analysis has permitted an increase in a Doppler resolution down to 0.02 Hz and in a temporal resolution down to 7.5 s. The number of radio propagation paths and their orientation depend on the specifics of problems being solved. The interpretation of the eclipse effects is complicated by processes launched by the dusk terminator. The eclipse was associated with an increase in the number of rays, the generation of oscillation processes in the atmospheric gravity wave range of periods, and with a negative Doppler shift of frequency at first and a positive shift of smaller magnitude subsequently. The solar eclipse launched similar to 9-14% amplitude quasiperiodic oscillations in the electron density, while a maximum decrease of order 26% was observed over the Hailar-Harbin path in the ionospheric E region. The latter value does not virtually differ from theoretical estimates.
机译：我们以研究为例，通过对2018年8月11日部分日食期间中国电离层中发生的动态过程进行研究，简要介绍了多频多径无线电系统并说明了其观测能力。软件定义的无线电技术能够在10kHz至30MHz的频段内运行，它是由所在地的哈尔滨工程大学和乌克兰的VN Karazin国立大学共同开发的。系统操作的原理基于频率的多普勒频移的测量。 Marple自回归谱分析算法的实现允许将多普勒分辨率提高到0.02 Hz，将时间分辨率提高到7.5 s。无线电传播路径的数量及其方向取决于要解决的问题的具体情况。月食效应的解释由于黄昏终结者发起的过程而变得复杂。月食与射线数量的增加，在大气重力波周期范围内的振荡过程的产生以及首先与频率的负多普勒频移以及随后的较小幅度的正频移相关。日食在电子密度方面发射出类似于9-14％振幅的准周期振荡，而在电离层E区域的Hailar-Harbin路径上观测到的最大衰减为26％。后者的值实际上与理论估计值没有差异。

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  • 来源
    《Radio Science》 |2020年第2期|1-24|共24页
  • 作者

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    Qingdao Univ Coll Elect & Informat Engn Qingdao Peoples R China|Harbin Engn Univ Coll Informat & Commun Engn Harbin Peoples R China;

    Kharkov Natl Univ Kharkiv Ukraine;

    Qingdao Univ Coll Elect & Informat Engn Qingdao Peoples R China;

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  • 正文语种 eng
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  • 关键词

    radio monitoring; dynamic processes; ionosphere; partial solar eclipse; terminator; passive HF radar;

    机译：无线电监测;动态过程;电离层日食终结者无源HF雷达;

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