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Prospects For Operational Hf Radar Measurements Of The Ocean Wave Directional Spectrum
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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 Status of HF Radars for Wave-Height Directional Spectral Measurements by : Donald E. Barrick
Download or read book Status of HF Radars for Wave-Height Directional Spectral Measurements written by Donald E. Barrick and published by . This book was released on 1982 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manuscript is a concise review of the status of high-frequency (HF) radars for measuring various descriptors of the ocean wave-height directional spectrum. It is not intended as a historical account of the many developments and contributors to the subject over the past three decades, nor is it meant to develop the theory and techniques of HF radar in sufficient detail for planning HF radar programs. Finally, no attempt is made to review every MF/ HF experiment performed or analyzed, although several very clever techniques have been tried (e.g., bistatic arrangements, synthetic aperture systems, and balloon-borne antennas); rather, techniques are discussed that appear to have potential for practical, operational ocean monitoring. The next section reviews very briefly the principles of HF radar sea echo that make it possible to measure the wave-height directional spectrum. The section following discusses the capability and status of sky-wave (over-the-horizon) radar for making wide- area ocean surface measurements. The final section discusses the application of HF ground-wave radars to measuring the wave-height directional spectrum, both for coastal use and for deployment from offshore platforms or ships, and their accuracy. In all cases, the limitations as well as the advantages of HF radars are indicated.
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 Direction and Frequency Resolution in HF Radar Directional Wave Spectra Measurements by : Lucy Rhiannon Wyatt
Download or read book Direction and Frequency Resolution in HF Radar Directional Wave Spectra Measurements written by Lucy Rhiannon Wyatt and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Directional Properties of Surface Waves Observed With HF Radar by :
Download or read book Directional Properties of Surface Waves Observed With HF Radar written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the work at Sheffield is to demonstrate that wave measurements obtained using HF radars are of sufficient accuracy and availability for them to contribute to the investigation of changes to the directional spectrum of waves subject to meteorological bathymetric and current variability in coastal environments for both scientific and operational applications. This report summarizes the measurements made with the OSCR HF radar in collaboration with the University of Miami, during the SHOWEX experiment in fall 1999 using inversion algorithms developed at the University of Sheffield. The data set obtained contains interesting examples of shoaling waves and fetch limited wave development but the amount of data obtained was limited by the hardware constraints of the OSCR system. Comparisons with directional wave buoys confirmed the results of earlier work that signal-to-noise and antenna sidelobes are the main sources of error in the radar wave measurements.
Book Synopsis Observation by HF Radar of the Phillips Resonance Mechanism for Generation of Wind Waves by :
Download or read book Observation by HF Radar of the Phillips Resonance Mechanism for Generation of Wind Waves written by and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Remote Sensing for Operational Applications by : Remote Sensing Society. Conference
Download or read book Remote Sensing for Operational Applications written by Remote Sensing Society. Conference and published by . This book was released on 1989 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Algorithm to Derive Wind Speed and Direction as Well as Ocean Wave Directional Spectra from HF Radar Backscatter Measurements Based on Neural Networks by : Wei Shen
Download or read book An Algorithm to Derive Wind Speed and Direction as Well as Ocean Wave Directional Spectra from HF Radar Backscatter Measurements Based on Neural Networks written by Wei Shen and published by . This book was released on 2011 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Algorithm to Derive Wind Speed and Direction as Well as Ocean Wave Directional Spectra from HF Radar Backscatter Measurements Based on Neural Network by : Wei Shen
Download or read book An Algorithm to Derive Wind Speed and Direction as Well as Ocean Wave Directional Spectra from HF Radar Backscatter Measurements Based on Neural Network written by Wei Shen and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Analysis of Directional Wave Spectra as Measured by H.F. Radar by : Frederick Edward Isaac
Download or read book Analysis of Directional Wave Spectra as Measured by H.F. Radar written by Frederick Edward Isaac and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Ocean Wave Spectra Using a Ship-mounted HF Radar by :
Download or read book Measurement of Ocean Wave Spectra Using a Ship-mounted HF Radar written by and published by . This book was released on 1990 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A promising alternative to in situ methods such as wave buoys for measuring ocean wave spectra is HF ground wave radar. This paper describes an algorithm used to extract the nondirectional wave-height spectrum from the backscatter return of a stationary ship- or rig-mounted radar employing an omnidirectional antenna for both transmission and reception. To test the effectiveness of the algorithm, its estimates are compared to those of a WAVE-TRACK buoy using data collected onboard CFAV Quest during 1988.
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 Analysis Methods for Narrow-beam High-frequency Radar Sea Echo by : Belinda J. Lipa
Download or read book Analysis Methods for Narrow-beam High-frequency Radar Sea Echo written by Belinda J. Lipa and published by . This book was released on 1982 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
