| 各向同性电离层低频一跳天波时延特性研究 |
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| 引用本文： | 周丽丽,闫晶晶,穆中林,王桥桥,刘承琳,何立风.各向同性电离层低频一跳天波时延特性研究[J].电子与信息学报,2020,42(7):1606-1610. |
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| 作者姓名： | 周丽丽 闫晶晶 穆中林 王桥桥 刘承琳 何立风 |
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| 作者单位： | 1.陕西科技大学电子信息与人工智能学院 西安 7100212.陕西科技大学电气与控制工程学院 西安 7100213.空军工程大学航空工程学院 西安 7100384.西安理工大学自动化与信息工程学院 西安 710048 |
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| 基金项目： | 国家自然科学基金(61401261)，中国博士后科学基金(2016M600803) |
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| 摘 要： | 低频天波的准确预测对于低电离层探测、远程导航授时具有重要意义。该文基于传统“波跳”理论和FDTD方法对地-电离层波导中天波传播时延特性进行研究。结合天地波时域分离技术，给出了100 kHz载频罗兰-C信号在均匀/指数渐变各向同性电离层条件下，距发射台200 km范围内采用两种方法计算的一跳天波时延随收发距离的变化规律。与“波跳”理论相比，该方法可同时考虑地面不规则、电离层昼夜参数分布不均匀的影响，计算精度更高。
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| 关 键 词： | 低频电波 “波跳”理论 一跳天波 时延 |
| 收稿时间： | 2019-07-11 |
Study on Time Delay Characteristics of Low Frequency One-hop Sky Waves in the Isotropic Ionosphere |
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| Lili ZHOU,Jingjing YAN,Zhonglin MU,Qiaoqiao WANG,Chenglin LIU,Lifeng HE.Study on Time Delay Characteristics of Low Frequency One-hop Sky Waves in the Isotropic Ionosphere[J].Journal of Electronics & Information Technology,2020,42(7):1606-1610. |
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| Authors: | Lili ZHOU Jingjing YAN Zhonglin MU Qiaoqiao WANG Chenglin LIU Lifeng HE |
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| Affiliation: | 1.School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China2.School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China3.College of Aeronautics Engineering, Air Force Engineering University, Xi’an 710038, China4.School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China |
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| Abstract: | Accurate prediction of low-frequency sky-wave has significance for the lower ionosphere detection and remote navigation timing. The characteristics of sky-wave propagation time delay in the Earth-ionosphere waveguide are studied in this paper based on the traditional wave-hop theory and FDTD method. Time delay variations of 100 kHz one-hop sky waves are given under homogeneous/exponentially graded isotropic ionosphere waveguide models. The great-circle distance between the transmitter and the receiver is within 200 km. Together with a sky- and ground-wave separation technique in the time domain, the narrow-band Loran-C signals are employed in two methods. Compared to the results of wave-hop theory, the method in this paper has higher calculation accuracy by considering the influence of irregular earth and inhomogeneous distribution of ionospheric day-night parameters at the same time. |
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