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Author : H. E. Krogstad
Release : 1991
Genre : Synthetic aperture radar
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis SAR Imaging of Ocean Waves by : H. E. Krogstad
Download or read book SAR Imaging of Ocean Waves written by H. E. Krogstad. This book was released on 1991. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. L. Schult
Release : 1988
Genre :
Kind : eBook
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Book Synopsis Imaging of Ocean Waves by SAR. by : R. L. Schult
Download or read book Imaging of Ocean Waves by SAR. written by R. L. Schult. This book was released on 1988. Available in PDF, EPUB and Kindle. Book excerpt: A model is presented for Synthetic Aperture Radar imaging of the ocean surface. The model attempts to avoid making assumptions about the relative importance of various imaging mechanisms. The model is applied to three issues, the focus setting, the asymmetry in the images obtained with obtained with opposite airplane flight directions, and the azimuthal image shift of features on range directed waves. The focus setting depends on a combination of the velocity of the pattern being imaged and on the velocity of the Bragg scatterers. The focus setting does not depend significantly on the imaging mechanism, that is velocity bunching, modulation of Bragg waves, and so on. Comparisons of our model predictions are made with the TOWARD results. A simple analytic prediction is obtained for the complete curve of the observed energy in swell versus the focus setting. The maximum of this curve is predicted to occur at one-half of the phase speed of the swell for azimuthally traveling swell and a simple explanation is provided for this result. The asymmetry in the visibility of the swell obtained by flying with or against the long waves is estimated. The asymmetry arises from competition between velocity bunching and hydrodynamic modulations. (JHD).
Author : Mikhail B. Kanevsky
Release : 2008-09-15
Genre : Science
Kind : eBook
Book Rating : 517/5 ( reviews)
Book Synopsis Radar Imaging of the Ocean Waves by : Mikhail B. Kanevsky
Download or read book Radar Imaging of the Ocean Waves written by Mikhail B. Kanevsky. This book was released on 2008-09-15. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to studying the ocean with radar tools, in particular, with space radars. Being intended mainly for the scientists preoccupied with the problem (as well as senior course students), it concentrates and generalizes the knowledge scattered over specialized journals. The significant part of the book contains the results obtained by the author. Systematically collects and describes the approaches used by different laboratories and institutions Deals with the physics of radar imagery and specifically with ocean surface imagery Useful for students and researchers specializing in the area of ocean remote sensing using airborne or space-borne radars, both SAR and RAR
Author : Robert A. Shuchman
Release : 1979
Genre :
Kind : eBook
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Book Synopsis Imaging Ocean Waves with SAR, a SAR Ocean Wave Algorithm Development Program by : Robert A. Shuchman
Download or read book Imaging Ocean Waves with SAR, a SAR Ocean Wave Algorithm Development Program written by Robert A. Shuchman. This book was released on 1979. Available in PDF, EPUB and Kindle. Book excerpt: Four principal activities are discussed in this report. They include: (1) SAR geometric distortion and an optical technique to correct these distortions, (2) a digital spectral estimation package designed specifically for SAR ocean wave data, (3) determination of wave height from SAR data, and (4) examination of the mechanism involved in SAR imaging of ocean waves.
Author : R. R. Hammond
Release : 1985
Genre : Artificial satellites
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Using Ship Wake Patterns to Evaluate Sar Ocean Wave Imaging Mechanisms by : R. R. Hammond
Download or read book Using Ship Wake Patterns to Evaluate Sar Ocean Wave Imaging Mechanisms written by R. R. Hammond. This book was released on 1985. Available in PDF, EPUB and Kindle. Book excerpt: The Joint Ocean Wave Investigation Project (JOWIP) was conducted to evaluate the detectability of ocean wave structures on imaging synthetic aperture radar (SAR). This project used Kelvin surface ship wake patterns generated under controlled and well documented surface environmental conditions to isolate SAR image parameters. Use of waves of known wavelength and direction provide the opportunity to evaluate the SAR contribution to ocean wave forecasting. SEASAT-like images made with L-band SAR are presented: (1) to suggest how ship-generated surface roughness combines with the velocity-bunching mechanism in calm ocean areas to produce the unusually narrow wakes observed for azimuth-traveling ships on SEASAT images; and (2) to estimate conditions under which SAR image modulation mechanisms can be expected to produce wake images. A method is described for using the Kelvin transverse ship wake wave component to quantitatively evaluate the contributions of various SAR ocean wave imaging mechanisms. It makes use of the narrow sector of surface roughness generated by a ship along its track to produce SAR images of the longest waves in its wake system on flat calm water.
