|
|||||
|
|
| 机载GPS反射信号土壤湿度测量技术 | |
| 引用本文： | 王迎强,严卫,符养,栾毅.机载GPS反射信号土壤湿度测量技术[J].遥感学报,2009,13(4):678-690. |
| 作者姓名： | 王迎强 严卫 符养 栾毅 |
| 作者单位： | 1. 解放军理工大学气象学院,江苏南京,211101 2. 北京应用气象研究所,北京,100029 3. 96631部队,北京,102208 |
| 基金项目： | 国家海洋局卫星海洋动力国家重点实验室开放研究基金(编号: SOED0705) |
| 摘 要： | 随着全球导航定位系统反射信号(GNSS-R)技术的发展, 近年来提出了利用GPS地表反射信号遥感土壤湿度的新方法, 该方法利用地表反射率与土壤介电常数以及介电常数与土壤湿度之间的关系来建立反演模型。为了可以快速方便的利用DMR实测数据反演得到土壤湿度, 本文根据Wang和Schmugge模型建立了土壤介电常数与湿度之间的分段模型, 实现了从原始反射数据到土壤湿度结果的整个反演流程。为了验证反演的可行性, 利用NASA等机构联合进行的SMEX02试验机载数据反演得到的结果表明, GPS反射信号能够有效地反演 |
| 关 键 词： | 土壤湿度 GNSS-R 土壤介电常数 SMEX02 镜像反射点 |
| 收稿时间： | 2008/5/12 0:00:00 |
| 修稿时间： | 2008/10/23 0:00:00 |
Soil moisture determination of reflected GPS signals from aircraft platform |
|
| WANG Ying-qiang,YAN Wei,FU Yang and LUAN Yi.Soil moisture determination of reflected GPS signals from aircraft platform[J].Journal of Remote Sensing,2009,13(4):678-690. | |
| Authors: | WANG Ying-qiang YAN Wei FU Yang and LUAN Yi |
| Institution: | 1. Institute of Meteorology, PLA University of Science & Technology, Jiangsu Nanjing 211101, China;1. Institute of Meteorology, PLA University of Science & Technology, Jiangsu Nanjing 211101, China;2. Beijing Institute of Applied Meteorology, Beijing 100029, China;3. 96631 Troops, Beijing 102208, China |
| Abstract: | Timely and accurate measurement of soil moisture and its fluctuation is of paramount significance in understanding the global water cycle and improving the weather forecast pattern. With the development of GNSS-R technology, the use of GPS signals reflected from the earth has been proposed as an alternative method to remotely sense soil moisture. Inversion model is established from the truth that the reflectivity is a function of soil dielectric constant which relates to the soil moisture. In order to determine soil moisture from collected data by DMR (Delay Mapping Receiver) fleetly, the whole retrieval flow is processed from original reflected data to soil moisture. In this study, a piecewise model is presented between soil dielectric constant and soil moisture. In order to test the feasibility, the SMEX02 experimental data on aircraft platform taken by NASA was used. The result shows the reflected GPS signal is sensitive to the surface soil moisture. |
| Keywords: | soil moisture GNSS-R soil dielectric constant SMEX02 specular reflection point |
| 本文献已被 万方数据 等数据库收录！ | |
| 点击此处可从《遥感学报》浏览原始摘要信息 | |
| 点击此处可从《遥感学报》下载免费的PDF全文 | |