Numerical simulation and validation of ocean waves measured by an Along-Track Interferometric Synthetic Aperture Radar

doi:10.1007/s00343-008-0001-z

IOCAS-IR > 海洋环流与波动重点实验室

	Numerical simulation and validation of ocean waves measured by an Along-Track Interferometric Synthetic Aperture Radar
	Zhang Biao 1,2; He Yijun 2; Vachon, Paris W.3
	2008-02-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	26 期号:1 页码:1-8
文章类型	Article
摘要	A new nonlinear integral transform of ocean wave spectra into Along-Track Interferometric Synthetic Aperture Radar (ATI-SAR) image spectra is described. ATI-SAR phase image spectra are calculated for various sea states and radar configurations based on the nonlinear integral transform. The numerical simulations show that the slant range to velocity ratio (R/V), significant wave height to ocean wavelength ratio (H-s/lambda), the baseline (2B) and incident angle (theta) affect ATI-SAR imaging. The ATI-SAR imaging theory is validated by means of Two X-band, HH-polarized ATI-SAR phase images of ocean waves and eight C-band, HH-polarized ATI-SAR phase image spectra of ocean waves. It is shown that ATI-SAR phase image spectra are in agreement with those calculated by forward mapping in situ directional wave spectra collected simultaneously with available ATI-SAR observations. ATI-SAR spectral correlation coefficients between observed and simulated are greater than 0.6 and are not sensitive to the degree of nonlinearity. However, the ATI-SAR phase image spectral turns towards the range direction, even if the real ocean wave direction is 30 degrees. It is also shown that the ATI-SAR imaging mechanism is significantly affected by the degree of velocity bunching nonlinearity, especially for high values of R/V and H-s/lambda.; A new nonlinear integral transform of ocean wave spectra into Along-Track Interferometric Synthetic Aperture Radar (ATI-SAR) image spectra is described. ATI-SAR phase image spectra are calculated for various sea states and radar configurations based on the nonlinear integral transform. The numerical simulations show that the slant range to velocity ratio (R/V), significant wave height to ocean wavelength ratio (H-s/lambda), the baseline (2B) and incident angle (theta) affect ATI-SAR imaging. The ATI-SAR imaging theory is validated by means of Two X-band, HH-polarized ATI-SAR phase images of ocean waves and eight C-band, HH-polarized ATI-SAR phase image spectra of ocean waves. It is shown that ATI-SAR phase image spectra are in agreement with those calculated by forward mapping in situ directional wave spectra collected simultaneously with available ATI-SAR observations. ATI-SAR spectral correlation coefficients between observed and simulated are greater than 0.6 and are not sensitive to the degree of nonlinearity. However, the ATI-SAR phase image spectral turns towards the range direction, even if the real ocean wave direction is 30 degrees. It is also shown that the ATI-SAR imaging mechanism is significantly affected by the degree of velocity bunching nonlinearity, especially for high values of R/V and H-s/lambda.
关键词	Ati-sar Nonlinear Integral Transform Numerical Simulation Validation
学科领域	Limnology ; Oceanography
DOI	10.1007/s00343-008-0001-z
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000255743900001
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5250
专题	海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Natl Res Council Canada, Canada Ctr Remote Sensing, Ottawa, ON K1A 0Y7, Canada
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhang Biao,He Yijun,Vachon, Paris W.. Numerical simulation and validation of ocean waves measured by an Along-Track Interferometric Synthetic Aperture Radar[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2008,26(1):1-8.
APA	Zhang Biao,He Yijun,&Vachon, Paris W..(2008).Numerical simulation and validation of ocean waves measured by an Along-Track Interferometric Synthetic Aperture Radar.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,26(1),1-8.
MLA	Zhang Biao,et al."Numerical simulation and validation of ocean waves measured by an Along-Track Interferometric Synthetic Aperture Radar".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 26.1(2008):1-8.

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