| 夏季短波Es场强计算方法研究 |
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| 引用本文： | 陈春,杨戈,林惠娇.夏季短波Es场强计算方法研究[J].电波科学学报,2021,36(2):285-295. |
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| 作者姓名： | 陈春 杨戈 林惠娇 |
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| 作者单位： | 1.中国电波传播研究所，青岛 266107 |
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| 摘 要： | Es层是发生在电离层E层高度上的突发不规则结构，短波接收电平与Es和F层反射密切相关，Es对短波通信影响很大，而中国是Es的高发区. 利用中国电离层垂测网的Es层临界频率foEs数据，分析了中国地区夏季Es空间分布特性及其对短波通信的影响. 研究发现，夏季Es层可提高短波链路最高可用频率，扩宽了可用频段，提高了信号质量. 基于短波链路中间点电离层垂测foEs数据构建了Es传播模型来预测Es期间的接收电平值，并与西安至青岛、西安至昆明短波链路接收电平观测值进行了比较. 结果显示，当工作频率为5 MHz、10 MHz和15 MHz时，其接收电平预测值与观测值相吻合，反映了实测接收电平的变化趋势.
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| 关 键 词： | 突发E层 Es强度 foEs 高频 场强 |
| 收稿时间： | 2020-03-09 |
Method for calculating Es field strength of HF bands in summer |
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| CHEN Chun,YANG Ge,LIN Huijiao.Method for calculating Es field strength of HF bands in summer[J].Chinese Journal of Radio Science,2021,36(2):285-295. |
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| Authors: | CHEN Chun YANG Ge LIN Huijiao |
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| Affiliation: | 1.China Research Institute of Radiowave Propagation, Qingdao 266071, China2.Urunchi Station, China Research Institute of Radiowave Propagation, Urumchi 830001, China3.Guangzhou Station, China Research Institute of Radiowave Propagation, Guangzhou 510000, China |
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| Abstract: | Sporadic E (Es) is the irregular structure of ionosphere occurred in the layer E sporadically and its influence is very important to shortwave communication, and Es is of frequency occurrence in China, Using the foEs data of the ionospheric vertical detection network in China, the spatial variation of occurrence of foEs and its influence on the short wave communication are analyzed. The short wave reception level is closely related to Es and F-layer reflection, which is the result of their joint action. In summer, the Es layer generally improves the maximum using frequency of the shortwave link, widens the available frequency band and improved signal quality. Based on the ionospheric foEs data at the intermediate point of the short wave link, the propagation model of Es is constructed to predict the received level during the happen of Es. The prediction values are compared with the observed values of the shortwave link from Xi’an to Qingdao and Xi’an to Kunming. The results show that through receiving the signal of 5 MHz, 10 MHz and 15 MHz operator frequency transmitted by national time service center, and the predicted values are corresponding to the measured values, which reflects the trend of the measured received level. |
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