基于北斗卫星反射信号的海面溢油探测方法及试验

doi:10.13700/j.bh.1001-5965.2016.0096

北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (1): 193-199.doi: 10.13700/j.bh.1001-5965.2016.0096

基于北斗卫星反射信号的海面溢油探测方法及试验

吴军, 张波, 洪学宝, 杨东凯, 汉牟田

北京航空航天大学电子信息工程学院, 北京 100083

收稿日期:2016-01-26 出版日期:2017-01-20 发布日期:2016-04-18
通讯作者: 张波,E-mail:bozhang@buaa.edu.cn E-mail:bozhang@buaa.edu.cn
作者简介:吴军,男,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;洪学宝,男,博士研究生。主要研究方向:卫星导航及其应用;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;汉牟田,男,硕士研究生。主要研究方向:卫星导航。
基金资助:
国家自然科学基金（61171070）

Sea surface oil spill detection method using BeiDou satellite reflected signal and its experiment

WU Jun, ZHANG Bo, HONG Xuebao, YANG Dongkai, HAN Mutian

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

Received:2016-01-26 Online:2017-01-20 Published:2016-04-18
Supported by:
National Natural Science Foundation of China (61171070)

摘要/Abstract

摘要： 为了监测小规模固定海域的溢油状况，针对岸基接收平台提出了一种基于北斗卫星反射信号的海面溢油探测方法，该方法将全球导航卫星系统反射信号（GNSS-R）技术应用于岸基条件下的海面溢油探测。进行了岸基试验，利用右旋圆极化（RHCP）天线和左旋圆极化（LHCP）天线分别采集北斗卫星直射与反射信号，在信号同步的基础上提取卫星直射和反射信号的相关功率，并结合北斗卫星的高度角与方位角信息，反演目标海域的介电常数来判断海面有无溢油。试验结果表明探测表面为油面时，介电常数反演结果均值为3.6，标准差为2.13，这与油的真实介电常数范围2.0~4.5一致，远小于海水介电常数，证明将GNSS-R应用到岸基海面溢油探测中具有可行性。

关键词: 全球导航卫星系统反射信号(GNSS-R), 北斗卫星反射信号, 岸基平台, 海面溢油探测, 介电常数

Abstract: To monitor the oil spill situation in small-scale fixed sea area, a shore-based sea surface oil spill detecting method was developed using BeiDou reflected signal. This method applies/global navigation satellite system-reflection (GNSS-R) technology to shore-based oil spill detection. A shore-based experiment has been carried out, in which a right hand circular polarization (RHCP) antenna and a left hand circular polarization (LHCP) antenna were used to gain the direct and reflected raw signal power from the BeiDou satellites based on signal synchronization respectively. After BeiDou satellites' elevation angle and azimuth angle are taken into account, whether oil spill events happened or not can be judged from the retrieved dielectric constant of sea surface, which is obtained from the reflectivity calculated according to the extracted signal power values. Experiment results show that the mean and standard deviation of retrieved dielectric constant is 3.6 and 2.13 respectively on an oil covered surface, which is in accordance with real oil dielectric constant that falls between 2.0 and 4.5, and much smaller than dielectric constant of sea water. It proves that the method using BeiDou reflected signal is feasible to detect oil spill events in shore-based environment.

Key words: global navigation satellite system-reflection(GNSS-R), BeiDou satellite reflected signal, shore-based platform, sea surface oil spill detection, dielectric constant

中图分类号:

P237

吴军, 张波, 洪学宝, 杨东凯, 汉牟田. 基于北斗卫星反射信号的海面溢油探测方法及试验[J]. 北京航空航天大学学报, 2017, 43(1): 193-199.

WU Jun, ZHANG Bo, HONG Xuebao, YANG Dongkai, HAN Mutian. Sea surface oil spill detection method using BeiDou satellite reflected signal and its experiment[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2017, 43(1): 193-199.

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基于北斗卫星反射信号的海面溢油探测方法及试验

Sea surface oil spill detection method using BeiDou satellite reflected signal and its experiment

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