各向同性电离层低频一跳天波时延特性研究

周丽丽; 闫晶晶; 穆中林; 王桥桥; 刘承琳; 何立风

doi:10.11999/JEIT190528

各向同性电离层低频一跳天波时延特性研究

doi: 10.11999/JEIT190528

1.
陕西科技大学电子信息与人工智能学院西安 710021
2.
陕西科技大学电气与控制工程学院西安 710021
3.
空军工程大学航空工程学院西安 710038
4.
西安理工大学自动化与信息工程学院西安 710048

基金项目: 国家自然科学基金(61401261)，中国博士后科学基金(2016M600803)

详细信息

作者简介:
周丽丽：女，1981年生，副教授，研究方向为电波传播与电磁场计算

闫晶晶：女，1993年生，硕士生，研究方向为电波传播与电磁场计算

穆中林：男，1981年生，讲师，研究方向为电波传播、导航与控制

王桥桥：女，1995年生，硕士生，研究方向为控制工程

刘承琳：女，1998年生，本科生，研究方向为控制工程

何立风：男，1962年生，教授，研究方向为模式识别与人工智能

通讯作者:
周丽丽　zhoulili@sust.edu.cn

中图分类号: TN011
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出版历程
- 收稿日期: 2019-07-11
- 修回日期: 2020-02-20
- 网络出版日期: 2020-03-25
- 刊出日期: 2020-07-23

Study on Time Delay Characteristics of Low Frequency One-hop Sky Waves in the Isotropic Ionosphere

1.
School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
2.
School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
3.
College of Aeronautics Engineering, Air Force Engineering University, Xi’an 710038, China
4.
School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China

Funds: The National Natural Science Foundation of China (61401261), China Postdoctoral Science Foundation (2016M600803)

摘要

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。
- 低频电波 /
- “波跳”理论 /
- 一跳天波 /
- 时延
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.
- Low-frequency wave /
- Wave-hop theory /
- One-hop sky wave /
- Time delay

HTML全文

图 1 低频天地波传播示意图

下载: 全尺寸图片幻灯片

图 2 平地面、均匀电离层波导模型的一跳天波2次时延

下载: 全尺寸图片幻灯片

图 3 平地面、指数渐变(垂直方向)电离层波导模型的一跳天波2次时延

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图 4 平地面、跨昼夜过渡区域电离层波导模型的一跳天波2次时延

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图 5 复杂地面、指数渐变(垂直方向)电离层波导模型的一跳天波2次时延

下载: 全尺寸图片幻灯片

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