| 孙凤娟,柳文,李铁成.电离层对短波测向系统的影响分析[J].装备环境工程,2017,14(7):45-49. SUN Feng-juan,LIU Wen,LI Tie-cheng.Effects of Ionosphere on High-frequency Direction Finding Systems[J].Equipment Environmental Engineering,2017,14(7):45-49. |
| 电离层对短波测向系统的影响分析 |
| Effects of Ionosphere on High-frequency Direction Finding Systems |
| 投稿时间：2017-03-20 修订日期：2017-07-15 |
| DOI：10.7643/ issn.1672-9242.2017.07.009 |
| 中文关键词: 电离层 短波测向 路径偏离效应 波干涉效应 行波扰动 系统倾斜 |
| 英文关键词:ionosphere hf direction finding path deviation effect wave-interference effect traveling wave disturbance (TID) systemic tilt |
| 基金项目:国家自然科学基金（61331012） |
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| 中文摘要: |
| 目的 研究电离层对短波测向系统的影响。方法 从电离层传播介质入手，分析路径偏离效应和波干涉效应的形成机理及其对短波测向的影响。结果 电离层系统倾斜引起的测向误差可借助电离层长期预测模型、短期预测算法或电离层实时探测数据对测向方位偏差进行补偿。行波扰动不可预测，只能依据行波扰动观测结果进行测向误差校正。波干涉误差可通过时间平滑进行抑制。结论 提升现有短波测向系统测向性能的根本途径是为短波测向系统配备电离层探测设备，准确获取系统覆盖区内电离层状态信息，并进行传播效应补偿。 |
| 英文摘要: |
| Objective To study effects of ionosphere on high-frequency direction finding systems. Methods The basic characteristics of ionosphere were firstly introduced, the formation mechanism of path deviation effect, wave-interference effect and its influences on HF direction finding were analyzed. Results With the ionospheric long-term prediction model, short-term prediction algorithm or ionospheric real-time sounding data, the error caused by ionospheric system tilt could be compensated. Traveling wave disturbances could not be predicted and the error caused by traveling wave disturbances could only be corrected based on the observed results of traveling wave disturbance. Time smoothing could suppress the wave interference error. Conclusion The basic way to improve the performance of HF direction finding system is to provide the ionospheric sounding equipment, to obtain the information of the ionospheric state in the coverage area and to carry out the compensation of the propagation effect. |
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