| 利用GNSS-R反射信号估计土壤湿度 |
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| 引用本文： | 张训械,严颂华.利用GNSS-R反射信号估计土壤湿度[J].全球定位系统,2009,34(3):1-6. |
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| 作者姓名： | 张训械 严颂华 |
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| 作者单位： | 1. 中国科学院武汉物理与数学研究所,湖北,武汉,430071
2. 武汉大学,电子信息学院,武汉,430079 |
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| 摘 要： | GNSS—R土壤湿度估计是利用接收直达波和土壤反射波的信号强度比值，通过反演得到土壤湿度参量。给出土壤反射波形的仿真结果，研究它们与土壤的介电常数和仰角的依赖关系。介绍了GNSS-R土壤湿度计的反演原理、观测设备和数据处理方法，并得出了初步的实验结果。GNSS—R反演得到的土壤湿度与同一地点用土壤湿度计测量值比较的结果显示，它们吻合得很好。
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| 关 键 词： | GNSS—R 遥感 土壤湿度测量 |
Soil Moisture Estimation Using GPS Reflected Signals |
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| ZHANG Xun-xie,YAN Song-hua.Soil Moisture Estimation Using GPS Reflected Signals[J].Gnss World of China,2009,34(3):1-6. |
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| Authors: | ZHANG Xun-xie YAN Song-hua |
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| Institution: | 1.Wuhan Institute of Physics and Mathematics;Chinese Academy of Science;Wuhan 430072;2.School of Electronic Information;Wuhan University;Wuhan 430079 China |
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| Abstract: | GNSS-R signals have been studied as the bistatic radar,and estimated to the soil moisture.The specific values between the reflected and directed wave are used to calculate the soil moisture.First,The waveforms of the reflected signal are simulated for understanding the dependence of the waveform on the soil's dielectric constant.Next,the method of the inversion of soil moisture,experiment equipment and data processing are given.Finaly,some experiment results and discussion are presented. |
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| Keywords: | GNSS-R |
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