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| 利用GPS反射信号遥感土地湿度变化趋势 | |
| 引用本文： | 王炎,杨东凯,胡国英,张孟阳,毛克彪.利用GPS反射信号遥感土地湿度变化趋势[J].全球定位系统,2009,34(5):7-10. |
| 作者姓名： | 王炎 杨东凯 胡国英 张孟阳 毛克彪 |
| 作者单位： | 1. 北京航空航天大学电子信息工程学院,北京,100191 2. 北京卫星信息工程研究所,北京,100086 3. 中国农业科学院农业资源与农业区划研究所农业部资源遥感与数字农业重点开放实验室,北京,100081 |
| 摘 要： | 介绍了GPS信号经过较平滑土地反射后信号特性的变化，建立起反射信号功率与土地湿度的对应关系，阐述了GPS—R接收机的构成，完成了在草地和裸地条件下的反射信号实时处理显示并存储。数据处理结果表明，利用所设计的GPS—R接收机处理出的归一化反射信号功率变化能够反映土地湿度变化的趋势。 |
| 关 键 词： | 土地湿度 GPS反射信号 GPS-R接收机 双基雷达 |
Remote Sensing of the Soil Moisture Using GPS-Reflected Signals |
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| Institution: | WANG Yan , YANG Dong-kai , HU Guo-ying , ZHANG Meng-yang ,MAO Ke-biao (1. School of Electronic and Information Engineering, Beihang University, Beijing 100191 China; 2. Belling Institute of Satellite Information Engineering, Be(jing 100086 China;3. Key Laboratory of Resources Remote Sensing and Digital Agriculture, MOA, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081 China) |
| Abstract: | The changes of signal characteristic after reflection from land are introduced in this paper. The relationship between the power of reflected signal and the soil moisture is established. And the structure GPS-R receiver is discussed afterwards. Two tests of the grassland and bare land have been finished. The processing result of reflected signal can output from the receiver in real time. Data analysis results show that normalized power of reflected signal can relate to the trend of soil moisture changes. |
| Keywords: | Soil moisture GPS-reflected signal GPS-R receiver bistatic radar |
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