岸基GNSS-R海上溢油探测方法

doi:10.13700/j.bh.1001-5965.2017.0083

北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (2): 383-390.doi: 10.13700/j.bh.1001-5965.2017.0083

岸基GNSS-R海上溢油探测方法

贾紫樱, 张波, 吴军, 杨东凯, 洪学宝

北京航空航天大学电子信息工程学院, 北京 100083

收稿日期:2017-02-21 修回日期:2017-05-19 出版日期:2018-02-20 发布日期:2017-09-18
通讯作者: 张波,E-mail:bozhang@buaa.edu.cn E-mail:bozhang@buaa.edu.cn
作者简介:贾紫樱,女,硕士研究生。主要研究方向:卫星导航;张波,男,博士,讲师,硕士生导师。主要研究方向:扩频通信、卫星导航及其应用等;吴军,男,硕士研究生。主要研究方向:卫星导航;杨东凯,男,博士,教授,博士生导师。主要研究方向:卫星导航信号处理及应用技术、无线数据传输等;洪学宝,男,博士研究生。主要研究方向:卫星导航及其应用。
基金资助:
国家自然科学基金（61171070）

Shore-based GNSS-R method for marine oil spill detection

JIA Ziying, ZHANG Bo, WU Jun, YANG Dongkai, HONG Xuebao

School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Received:2017-02-21 Revised:2017-05-19 Online:2018-02-20 Published:2017-09-18
Supported by:
National Natural Science Foundation of China (61171070)

摘要/Abstract

摘要： 从岸基角度出发，利用全球导航卫星系统反射信号（GNSS-R）技术，同时结合电磁波的部分去极化现象以及反射率与海面粗糙度特征函数的映射关系，建立了三天线观测模式下的海上溢油探测模型，根据反演出目标水域的相对介电常数来判断有无溢油。通过2次实验分别采集污油和潮间带的GNSS直射信号以及反射信号中的左旋、右旋圆极化分量，依据反演模型处理数据并进行了总结与分析。从实验结果来看，当探测表面为油面时反演出的相对介电常数其均值为2.14，标准差为1.44，而海滩在历经潮水的涨落时所反演出相对介电常数值也存在明显的由小增大再减小的过程，油、水反演值差异明显，同时与理论相对介电常数值具有较好的一致性，说明此方法在岸基海上溢油遥感领域具有一定的可行性。

关键词: 全球导航卫星系统反射信号(GNSS-R), 海上溢油, 岸基平台, 介电常数, 反射率极化比

Abstract: From the perspective of shore-based application, a marine oil spill detection model based on the inversion of the target water's relative dielectric constant was established using the three-antenna global navigation satellite system-reflection (GNSS-R) technology, the partial depolarization phenomenon of the electromagnetic wave, and the mapping relationship between reflectivity and characteristic function of surface roughness. For this purpose, GNSS direct signal, left-hand and right-hand circular polarization components of reflected signals were collected by two field experiments for heavy oil and intertidal zone respectively. After processing the data according to the inversion model, the summary as well as the analysis were carried out. From the experimental results, the mean of retrieved dielectric constant of the oil covered surface is 2.14, its standard deviation is 1.44, and the dielectric constant of the beach has undergone a process of obvious increase and decrease, which is highly consistent with the flood and ebb tide alternates. The difference between oil and water inversion is obvious. The inversion results have a good agreement with the theoretical dielectric constant, which means that this method is feasible for marine oil spill remote sensing in shore-based environment to a certain extent.

Key words: global navigation satellite system-reflection (GNSS-R), marine oil spill, shore-based platform, dielectric constant, polarization-ratio of reflectivity

中图分类号:

P237

贾紫樱, 张波, 吴军, 杨东凯, 洪学宝. 岸基GNSS-R海上溢油探测方法[J]. 北京航空航天大学学报, 2018, 44(2): 383-390.

JIA Ziying, ZHANG Bo, WU Jun, YANG Dongkai, HONG Xuebao. Shore-based GNSS-R method for marine oil spill detection[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2018, 44(2): 383-390.

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岸基GNSS-R海上溢油探测方法

Shore-based GNSS-R method for marine oil spill detection

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