气候变化领域集成服务门户(CCPortal): Discrimination of open water from sea ice in the Labrador Sea using quad-polarized synthetic aperture radar

CCPortal

DOI	10.1016/j.rse.2020.111948
	Discrimination of open water from sea ice in the Labrador Sea using quad-polarized synthetic aperture radar
	Xie T.; Perrie W.; Wei C.; Zhao L.
发表日期	2020
ISSN	00344257
卷号	247
英文摘要	A method to differentiate open water from sea ice using quad-polarization C-band synthetic aperture radar (SAR) imagery is presented, based on the roughness properties of the sea surface scattering facets and the polarization ratio (PR) between VV and HH polarization backscatter from the SAR images. In quad-polarization SAR images, the normalized radar cross section (NRCS), which is linked to sea surface roughness, can be used to derive the orientation angle shift and its standard deviation, as well as to compute the measured polarization ratio, PR. An X-Bragg backscatter model is explored to calculate a theoretical look-up table for the polarization ratio as a function of incidence angle, dielectric constant, orientation angle shift and its standard deviation. Thus, ocean surface backscatter can be identified as open water or sea ice by comparing the measured PR with a theoretical model for PR. The proposed method is validated by comparison to collocated optical video images and manual visual interpretations. Estimates of the size, shape and locations of open water from our method are shown to be in good agreement with observed data. The overall accuracy of our algorithm is about 96%. The classification accuracy for sea ice and open water is about 96% and 94%, respectively. © 2020 The Authors
英文关键词	Open water; Sea ice; Sea surface roughness; Synthetic aperture radar (SAR)
语种	英语
scopus关键词	Backscattering; Polarization; Radar cross section; Radar measurement; Sea ice; Statistics; Surface roughness; Surface scattering; Surface waters; Synthetic aperture radar; Table lookup; Classification accuracy; Normalized radar cross section; Orientation angle shift; Sea surface roughness; Sea surface scattering; Synthetic Aperture Radar Imagery; Theoretical modeling; Visual interpretation; Radar imaging; accuracy assessment; backscatter; classification; open water; polarization; satellite imagery; sea ice; sea surface; synthetic aperture radar; Atlantic Ocean; Labrador Sea
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179225
作者单位	School of Remote Sensing & Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, China; Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada; National Satellite Meteorological Center, China Meteorological Administration, Beijing, China; School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
推荐引用方式 GB/T 7714	Xie T.,Perrie W.,Wei C.,et al. Discrimination of open water from sea ice in the Labrador Sea using quad-polarized synthetic aperture radar[J],2020,247.
APA	Xie T.,Perrie W.,Wei C.,&Zhao L..(2020).Discrimination of open water from sea ice in the Labrador Sea using quad-polarized synthetic aperture radar.Remote Sensing of Environment,247.
MLA	Xie T.,et al."Discrimination of open water from sea ice in the Labrador Sea using quad-polarized synthetic aperture radar".Remote Sensing of Environment 247(2020).