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GNSS-R海面目标成像仿真方法研究

Research on GNSS-R sea surface target imaging simulation method
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摘要 结合物理光学法及传统复合电磁散射计算模型中的'四路径'方法,以GNSS信号为信号源,提出了一种基于高频散射理论的GNSS-SAR成像模型,建模过程考虑了多路径散射、遮蔽、漫散射等效应,较好地描述了电磁散射效应对海面场景GNSS-SAR成像的影响。根据电磁散射效应,分析了海面风速对成像效果产生的干扰情况,发现在本文仿真场景下,9 m/s风速海背景下的目标能够被识别出来,17 m/s风速海背景下的目标几乎淹没在海杂波中。 Based on scattering theory in high-frequency,this paper presents a new GNSS-SAR imaging model.The model takes GNSS signal as sources,describes the influence of electromagnetic scattering on GNSS-SAR imaging on sea surface,with the combination of physical optic methods and four-path method,which has been used in some traditional composite models on electromagnetic scattering calculation.Besides,the effects of multi-path scattering,shadowing,and diffuse scattering are also considered.According to electromagnetic scattering theory,we have analyzed the disturbance of wind speed on sea surface.In conclusion,in the scenario we simulated in paper,the target can be recognized if wind speed is 9 m/s,but when wind speed comes to 17 m/s,the recognition will fail.
作者 张元迪 焦瑞莉 朱云龙 吴世玉 ZHANG YuANDi;JIAO Ruili;ZHU Yunlong;WU Shiyu(School of Information and Communication,Beijing Information Science and Technology University,Beijing 100101,China;School of Electronics and Information Engineering,Beihang University,Beijing 100083,China)
出处 《测绘通报》 CSCD 北大核心 2019年第2期86-90,107共6页 Bulletin of Surveying and Mapping
基金 金华航大北斗应用技术有限公司技术成果转化及产业化资金(BARI1706).
关键词 全球卫星导航系统 合成孔径雷达 电磁散射系数 四路径模型 global navigation satellite system synthetic aperture radar electromagnetic scattering coefficient four-path model
作者简介 张元迪(1993—),女,硕士生,研究方向为GNSS遥感。E-mail:zhangyuandisun@163.com;通信作者:焦瑞莉。E-mail:jiaoruili@bistu.edu.cn。
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