摘要
水深是重要的海洋要素,水深遥感反演是获取浅水水深的重要手段。当前水深遥感反演应用以国外卫星数据为主,国产卫星数据的研究和应用较少。本文针对国产高分六号卫星(GF-6)数据,以三亚南山港为研究区域,分别建立单波段回归模型、双波段比值模型、多波段回归模型,进行多光谱影像的水深反演能力研究,并与国外主流哨兵2号卫星(Sentinel-2)数据进行实验比较。实验结果表明:GF-6遥感影像具有较好的浅水水深反演能力和一定的反演精度,各波段水深探测能力依次为:绿波段>蓝波段>红波段>近红外波段,反演方法效果依次为:多波段模型>双波段模型>单波段模型。相较于Sentinel-2数据,GF-6数据水深反演精度与其一致,这表明GF-6影像具备替代国外遥感数据进行水深反演的能力和大规模应用的潜力。本文的研究方法和分析结果将为国产高分系列卫星数据的水深反演研究和应用提供有益的参考。
Water depth is an important marine factor,and satellite derived bathymetry is an important means to obtain shallow water depth.At present,the research and application of satellite derived bathymetry are mainly based on foreign satellite image,while the research and application of domestic satellite image are few.This study,based on the image of GF-6 and Nanshan Port of Sanya as the research area,single-band regression model,double-band ratio model and multi-band regression model were established respectively to study the satellite derived bathymetry capability of multi-spectral image.The satellite derived bathymetry results of GF-6 remote sensing image and Sentinel-2 remote sensing image were compared experimentally.Results indicate that the multi-band model shows the best effect,the dual-band model the second,and the single-band model the last.For the single-band model,the satellite derived bathymetry ability order from the best to the worst is:green band,blue band,red band,and near infrared band.The satellite derived bathymetry accuracy of GF-6 remote sensing data is roughly the same as that of Sentinel-2 remote sensing image,which indicates that GF-6 has the ability to replace foreign remote sensing image for satellite derived bathymetry and has the potential of large-scale application.In this paper,the research and results of the bathymetric inversion ability of the remote sensing image of GF-6 satellite will provide a useful reference for the research and application of the bathymetric inversion of domestic GaoFen satellite data.
作者
沈蔚
郝李华
陈沐崟
李鑫
SHEN Wei;HAO Lihua;CHEN Muyin;LI Xin(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Shanghai Estuary Marine Surveying and Mapping Engineering Technology Research Center,Shanghai 201306,China)
出处
《海洋技术学报》
2023年第4期28-34,共7页
Journal of Ocean Technology
基金
高分辨率对地观测系统重大专项项目(07-Y30B03-9001-19/21)。
关键词
水深反演
模型
精度评价
高分六号
多光谱影像
bathymetry retrieval
model
evaluation of accuracy
GF-6 satellite
multispectral image
