地基GNSS-IR风速反演原理及方法初探
随着全球导航卫星系统（Global Navigation Satellite Systems，GNSS）的发展，曾经被认为是误差源的多路径效应，已经被证实可以用来监测水位、雪深、植被指数、土壤湿度等反射面参数，其中的地基分支逐步发展为GNSS干涉遥感（GNSS-interferometry reflectometry，GNSS-IR）技术。为了扩展GNSS-IR技术的监测对象和应用范围，本文提出了一套地基GNSS-IR风速反演的原理及方法。首先，本文基于信噪比（signal-to-noise ratio，SNR）振荡原理、散射模型原理、波浪谱原理，从理论上证明了SNR截止高度角参数与风速之间存...
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| Published in | Ce hui xue bao Vol. 50; no. 10; pp. 1298 - 1307 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese English |
| Published |
Beijing
Surveying and Mapping Press
01.10.2021
长安大学地质工程与测绘学院,陕西西安710054%河海大学地球科学与工程学院,江苏 南京 211100%长安大学地质工程与测绘学院,陕西西安710054 河海大学地球科学与工程学院,江苏 南京 211100 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 1001-1595 |
| DOI | 10.11947/j.AGCS.2021.20200586 |
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| Abstract | 随着全球导航卫星系统（Global Navigation Satellite Systems，GNSS）的发展，曾经被认为是误差源的多路径效应，已经被证实可以用来监测水位、雪深、植被指数、土壤湿度等反射面参数，其中的地基分支逐步发展为GNSS干涉遥感（GNSS-interferometry reflectometry，GNSS-IR）技术。为了扩展GNSS-IR技术的监测对象和应用范围，本文提出了一套地基GNSS-IR风速反演的原理及方法。首先，本文基于信噪比（signal-to-noise ratio，SNR）振荡原理、散射模型原理、波浪谱原理，从理论上证明了SNR截止高度角参数与风速之间存在一一对应的数学关系，并仿真得到了具体的数学关系。然后，本文使用小波分析方法从实测SNR序列中获取SNR截止高度角，并将同一GPS卫星、每天同一时间内SNR序列的截止高度角进行基准统一，获得截止高度角变化量；根据该变化量反演风速。算例选取香港HKQT站在“山竹”和“天鸽”台风前后时间的数据进行分析，结果发现：GPS L5信号的截止高度角变化量与实测风速数据对应关系良好，相关性达到70%~85%；截止高度角变化量可以刻画风速从低风速逐步抬升至高风速的变化情况；同一站点截止高度角变化量与风速之间存在特定的数学关系；相关结论证实了利用SNR可以估计风速变化。最后，本文讨论了GNSS-IR风速反演技术中下一步的研究方向，以期推进该技术的实际应用进程。 |
|---|---|
| AbstractList | 随着全球导航卫星系统（Global Navigation Satellite Systems，GNSS）的发展，曾经被认为是误差源的多路径效应，已经被证实可以用来监测水位、雪深、植被指数、土壤湿度等反射面参数，其中的地基分支逐步发展为GNSS干涉遥感（GNSS-interferometry reflectometry，GNSS-IR）技术。为了扩展GNSS-IR技术的监测对象和应用范围，本文提出了一套地基GNSS-IR风速反演的原理及方法。首先，本文基于信噪比（signal-to-noise ratio，SNR）振荡原理、散射模型原理、波浪谱原理，从理论上证明了SNR截止高度角参数与风速之间存在一一对应的数学关系，并仿真得到了具体的数学关系。然后，本文使用小波分析方法从实测SNR序列中获取SNR截止高度角，并将同一GPS卫星、每天同一时间内SNR序列的截止高度角进行基准统一，获得截止高度角变化量；根据该变化量反演风速。算例选取香港HKQT站在“山竹”和“天鸽”台风前后时间的数据进行分析，结果发现：GPS L5信号的截止高度角变化量与实测风速数据对应关系良好，相关性达到70%~85%；截止高度角变化量可以刻画风速从低风速逐步抬升至高风速的变化情况；同一站点截止高度角变化量与风速之间存在特定的数学关系；相关结论证实了利用SNR可以估计风速变化。最后，本文讨论了GNSS-IR风速反演技术中下一步的研究方向，以期推进该技术的实际应用进程。 P237; 随着全球导航卫星系统(Global Navigation Satellite Systems,GNSS)的发展,曾经被认为是误差源的多路径效应,已经被证实可以用来监测水位、雪深、植被指数、土壤湿度等反射面参数,其中的地基分支逐步发展为GNSS干涉遥感(GNSS-interferometry refl ectometry,GNSS-IR)技术.为了扩展GNSS-IR技术的监测对象和应用范围,本文提出了一套地基GNSS-IR风速反演的原理及方法.首先,本文基于信噪比(signal-to-noise ratio,SNR)振荡原理、散射模型原理、波浪谱原理,从理论上证明了SNR截止高度角参数与风速之间存在一一对应的数学关系,并仿真得到了具体的数学关系.然后,本文使用小波分析方法从实测SNR序列中获取SNR截止高度角,并将同一GPS卫星、每天同一时间内SNR序列的截止高度角进行基准统一,获得截止高度角变化量;根据该变化量反演风速.算例选取香港HKQT站在"山竹"和"天鸽"台风前后时间的数据进行分析,结果发现:GPS L5信号的截止高度角变化量与实测风速数据对应关系良好,相关性达到70％ ～85％;截止高度角变化量可以刻画风速从低风速逐步抬升至高风速的变化情况;同一站点截止高度角变化量与风速之间存在特定的数学关系;相关结论证实了利用SNR可以估计风速变化.最后,本文讨论了GNSS-IR风速反演技术中下一步的研究方向,以期推进该技术的实际应用进程. |
| Author | 陈殊 宋敏峰 何秀凤 王笑蕾 张勤 |
| AuthorAffiliation | 河海大学地球科学与工程学院,江苏 南京 211100;长安大学地质工程与测绘学院,陕西西安710054%河海大学地球科学与工程学院,江苏 南京 211100%长安大学地质工程与测绘学院,陕西西安710054 |
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| Author_FL | HE Xiufeng ZHANG Qin SONG Minfeng WANG Xiaolei CHEN Shu |
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| Copyright | Oct 2021. This work is published under https://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| Keywords | GNSS干涉遥感;风速;多路径;信噪比;截止高度角;小波分析 |
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| Snippet | 随着全球导航卫星系统（Global Navigation Satellite Systems，GNSS）的发展，曾经被认为是误差源的多路径效应，已经被证实可以用来监测水位、雪深、植被指数、土壤湿度等反射面参数，其中的地基分支逐步发展为GNSS干涉遥感（GNSS-interferometry... P237; 随着全球导航卫星系统(Global Navigation Satellite Systems,GNSS)的发展,曾经被认为是误差源的多路径效应,已经被证实可以用来监测水位、雪深、植被指数、土壤湿度等反射面参数,其中的地基分支逐步发展为GNSS干涉遥感(GNSS-interferometry refl... |
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| SubjectTerms | Correlation coefficient Correlation coefficients Elevation Elevation angle Global navigation satellite system Global positioning systems GPS Interferometry Mathematical models Moisture content Moisture effects Signal to noise ratio Snow depth Soil moisture Soil water Water content Water depth Water levels Wave spectra Wavelet analysis Wind measurement Wind speed |
| Title | 地基GNSS-IR风速反演原理及方法初探 |
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