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Remote Sensing Of The Directional Ocean Wave Spectra Using Hf Backscatter Radar
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Book Synopsis Remote Sensing of the Directional Ocean Wave Spectra Using HF Backscatter Radar by : Abdelrahman M. Elabdalla
Download or read book Remote Sensing of the Directional Ocean Wave Spectra Using HF Backscatter Radar written by Abdelrahman M. Elabdalla and published by . This book was released on 1982 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Remote Sensing of Ocean Surface Current and Current Shear by HF Backscatter Radar by : Eng-Chong Ha
Download or read book Remote Sensing of Ocean Surface Current and Current Shear by HF Backscatter Radar written by Eng-Chong Ha and published by . This book was released on 1979 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Doppler spectrum of radar return from the sea at HF contains two narrow lines displaced upward and downward from the carrier frequency, resulting from backscatter off ocean surface waves moving toward and away from the radar, respectively. These Bragg lines indicate resonant backscatter which occurs for the ocean waves of length one-half the radio wavelength. The phase velocity of these gravity waves consists of two components; the first is determined by the wavelength and the second by the current component in the direction of wave propagation averaged over depth with an exponential weighting function that has a characteristic scale proportional to the wavelength. The Doppler shift of the radar carrier is determined by the wave phase velocity. Its variation with carrier frequency is thus related to the vertical profile of the current component in the radar direction by a Laplace transform; therein lies the principle of radio measurement of ocean current and its vertical shear. Radio backscatter experiments to verify the feasibility of such measurements were conducted using the radar operating at four frequencies covering the range from 3 to 30 MHz. The depth-averaged radial current deduced from the centroid of the Doppler-shifted sea echo experiments at 6.8, 13.3, 21.7, and 29.8 MHz showed fluctuations on the order of 1 cm/sec superimposed on temporal trends that reached maximum values of about 40 cm/sec. It is concluded that multifrequency backscatter ground-wave radar at HF constitutes a powerful technique for mapping current and its vertical profile in the top few meters of the ocean.
Book Synopsis The High Frequency Surface Wave Radar Cross Section for Ocean Swell by : Chengxi Shen
Download or read book The High Frequency Surface Wave Radar Cross Section for Ocean Swell written by Chengxi Shen and published by . This book was released on 2013 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 and published by Elsevier. This book was released on 2008-09-15 with total page 207 pages. 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
Book Synopsis Ocean Remote Sensing Technologies by : Weimin Huang
Download or read book Ocean Remote Sensing Technologies written by Weimin Huang and published by IET. This book was released on 2021-12-17 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a systematic introduction to the principles, state-of-the-art methods and applications of high frequency surface/sky wave radar and microwave marine radar, as well as an exploration of ongoing challenges in the field. It is a valuable resource for the radar and remote sensing communities.
Book Synopsis Remote Sensing of Ocean Waves by Surface Contour Radar by : Edward J. Walsh
Download or read book Remote Sensing of Ocean Waves by Surface Contour Radar written by Edward J. Walsh and published by . This book was released on 1982 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Surface Contour Radar (SCR), developed jointly by NASA Wallops Flight Center (WFC) and the Naval Research Laboratory, is an airborne, computer-controlled 36 GHz bistatic radar that produces a real-time topographical map of the surface beneath the aircraft. The SCR, described in detail by Kenney et al. (1979), was designed to measure the directional wave spectra of the ocean surface. Of the remote sensing instruments described in these proceedings, the SCR operates by the simplest measurement concept and offers the greatest ease of data interpretation, since it involves a direct range measurement.
Author :Kenneth Paul Klein Publisher :St. John's : Centre for Cold Ocean Resources Engineering, Memorial University of Newfoundland ISBN 13 :9780889011021 Total Pages :76 pages Book Rating :4.0/5 (11 download)
Book Synopsis A Feasibility Study of Using HF Groundwave Radar for Sea Ice and Iceberg Detection : Evaluation of an HF Antenna and Data Collection of Ocean Spectra by : Kenneth Paul Klein
Download or read book A Feasibility Study of Using HF Groundwave Radar for Sea Ice and Iceberg Detection : Evaluation of an HF Antenna and Data Collection of Ocean Spectra written by Kenneth Paul Klein and published by St. John's : Centre for Cold Ocean Resources Engineering, Memorial University of Newfoundland. This book was released on 1983 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical report. Investigation of ocean and ice feature remote sensing by terrestrial based radar systems operating at HF frequency. Data set of ocean backscatter for different wind, wave and surface current conditions.
Book Synopsis An Algorithm for the Extraction of Ocean Wave Parameters from Wide Beam HF Radar (CODAR) Backscatter by : Eric William Gill
Download or read book An Algorithm for the Extraction of Ocean Wave Parameters from Wide Beam HF Radar (CODAR) Backscatter written by Eric William Gill and published by . This book was released on 1990 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Extraction of Ocean Wave Parameters from Wide Beam HF Radar Backscatter by :
Download or read book Extraction of Ocean Wave Parameters from Wide Beam HF Radar Backscatter written by and published by . This book was released on 1990 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, high-frequency ground wave Doppler radar has emerged as a powerful tool in the remote sensing of ocean surface phenomena, particularly in coastal regions. This paper examines how a four-element square array, now used for mapping surface currents, could be used to extract ocean wave parameters.
Book Synopsis The Dependence of the Radar Modulation Transfer Function on Environmental Conditions and Wave Parameters (A Contribution to Studies of Radar Backscattering from the Sea Surface). Revision by : David E. Weissman
Download or read book The Dependence of the Radar Modulation Transfer Function on Environmental Conditions and Wave Parameters (A Contribution to Studies of Radar Backscattering from the Sea Surface). Revision written by David E. Weissman and published by . This book was released on 1983 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report shows how the Modulation Transfer Function, an important quantity for remote microwave sensing of ocean wave spectra, will vary with environmental conditions that control the air-sea interaction. The accuracy with which this quantity is known will determine the quality of remote measurements of ocean wave spectra. Microwave remote sensing of individual ocean wavelengths (and the complete directional spectrum) is based on synchronized reflectivity variations along each wave, that the radar can resolve spatially. This study demonstrates that the MTF, which is the ratio of this reflectivity (amplitude of variation) to the ocean wave amplitude, is affected by the air-sea interaction, in addition to the hydrodynamic interaction between capillary and long gravity waves. Recent measurements by the Naval Research Laboratory of the ocean wave-radar modulation transfer function (MTF) from fixed ocean platforms, over a period of several years, have demonstrated that the local hydrodynamic modulation of short centimeter waves is affected by the air-sea interaction. Results from widely separated ocean regions also show different individual properties, that make detailed measurements necessary.
Book Synopsis Prospects for Operational HF Radar Measurements of the Ocean Wave Directional Spectrum by : Lucy Rhiannon Wyatt
Download or read book Prospects for Operational HF Radar Measurements of the Ocean Wave Directional Spectrum written by Lucy Rhiannon Wyatt and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radar Scattering from Modulated Wind Waves by : G.J. Komen
Download or read book Radar Scattering from Modulated Wind Waves written by G.J. Komen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ten years ago, de Loor and co-workers at TNO, The Netherlands, were the first to report bottom topography patterns in real aperture radar (RAR) images of the southern North Sea. At that time, this was a real puzzle. The skin depth of microwaves for sea water is only of the order of centimeters while the sea bottom is about 20 meters below the surface. Electromagnetic radiation therefore cannot probe the bottom directly. Similar phenomena were found in radar imagery from SEASAT and SIR-AlB synthetic aperture radars (SAR's) of Nantucket Shoals, the English Channel and many other coastal areas. Since then theory and ocean field experiments (Le., Phelps Bank, Georgia Straits, SARSEX, TOWARD, FASINEX, etc.) have advanced our understanding considerably. We now know that these surface signatures are the results of surface currents, perturbed by the bottom topography, which refract the propagation and modulate the energy of (short) surface waves so as to cause microwave backscatter power variations. Hence, any large scale ocean features containing nonuniform surface currents (i.e. internal waves, eddies, fronts, etc.) will cause similar manifestations in the radar imagery by means of current-wave-microwave interactions. Observations confirm this.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proposal to Demonstrate an HF Radar System for Measuring the Ocean-wave Directional Spectrum from Offshore Platforms by :
Download or read book Proposal to Demonstrate an HF Radar System for Measuring the Ocean-wave Directional Spectrum from Offshore Platforms written by and published by . This book was released on 1981 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Variability of Doppler Spectra in Hf Groundwave Radar Remote Sensing Over the Ocean Surface by : Jianjun Zhang
Download or read book On the Variability of Doppler Spectra in Hf Groundwave Radar Remote Sensing Over the Ocean Surface written by Jianjun Zhang and published by . This book was released on 2009 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Signal Processing Methods to Improve Ocean Surface Wave Estimation from a High Frequency Surface Wave Radar by :
Download or read book Signal Processing Methods to Improve Ocean Surface Wave Estimation from a High Frequency Surface Wave Radar written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coastal Engineering 2004 - Proceedings Of The 29th International Conference (In 4 Vols) by : Jane Mckee Smith
Download or read book Coastal Engineering 2004 - Proceedings Of The 29th International Conference (In 4 Vols) written by Jane Mckee Smith and published by World Scientific. This book was released on 2005-04-08 with total page 4836 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and up-to-date volume contains 367 papers presented at the 29th International Conference on Coastal Engineering, held in Lisbon, Portugal, 19-24 September 2004. It is divided into five parts: waves; long waves, nearshore currents, and swash; sediment transport and morphology; coastal management, beach nourishment, and dredging; coastal structures. The contributions cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2004 provides engineers, scientists, and planners state-of-the-art information on coastal engineering and coastal processes.The proceedings have been selected for coverage in:
