Remote Sensing Of Ocean Surface Current And Current Shear By Hf Backscatter Radar

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Remote Sensing of Ocean Surface Current and Current Shear by HF Backscatter Radar

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Author : Eng-Chong Ha
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.F/5 ( download)

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.

Ocean Remote Sensing Technologies

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Author : Weimin Huang
Publisher : IET
ISBN 13 : 1839531614
Total Pages : 654 pages
Book Rating : 4.8/5 (395 download)

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.

Remote Sensing of Surface Currents in Shelf Sea Environments by HF Radar

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Author : J. P. Matthews
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (131 download)

Book Synopsis Remote Sensing of Surface Currents in Shelf Sea Environments by HF Radar by : J. P. Matthews

Download or read book Remote Sensing of Surface Currents in Shelf Sea Environments by HF Radar written by J. P. Matthews and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Measuring Ocean Currents

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Author : Antony Joseph
Publisher : Newnes
ISBN 13 : 0123914280
Total Pages : 447 pages
Book Rating : 4.1/5 (239 download)

Book Synopsis Measuring Ocean Currents by : Antony Joseph

Download or read book Measuring Ocean Currents written by Antony Joseph and published by Newnes. This book was released on 2013-08-12 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring Ocean Currents: Tools, Technologies, and Data covers all major aspects of ocean current measurements in view of the implications of ocean currents on changing climate, increasing pollution levels, and offshore engineering activities. Although more than 70% of the Earth is covered by ocean, there is limited information on the countless fine- to large-scale water motions taking place within them. This book fills that information gap as the first work that summarizes the state-of-the-art methods and instruments used for surface, subsurface, and abyssal ocean current measurements. Readers of this book will find a wealth of information on Lagrangian measurements, horizontal mapping, imaging, Eulerian measurements, and vertical profiling techniques. In addition, the book describes modern technologies for remote measurement of ocean currents and their signatures, including HF Doppler radar systems, satellite-borne sensors, ocean acoustic tomography, and more. Crucial aspects of ocean currents are described in detail as well, including dispersion of effluents discharged into the sea and transport of beneficial materials—as well as environmentally hazardous materials—from one region to another. The book highlights several important practical applications, showing how measurements relate to climate change and pollution levels, how they affect coastal and offshore engineering activities, and how they can aid in tsunami detection. Coverage of measurement, mapping and profiling techniques Descriptions of technologies for remote measurement of ocean currents and their signatures Reviews crucial aspects of ocean currents, including special emphasis on the planet-spanning thermohaline circulation, known as the ocean's "conveyor belt," and its crucial role in climate change

Remote Sensing of the Directional Ocean Wave Spectra Using HF Backscatter Radar

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Author : Abdelrahman M. Elabdalla
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (318 download)

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:

Extraction of Ocean Wave Parameters from Wide Beam HF Radar Backscatter

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Author :
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (932 download)

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.

Remote Sensing and Validation of Surface Currents from HF Radar

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Author : Darryl C. Melton
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (777 download)

Book Synopsis Remote Sensing and Validation of Surface Currents from HF Radar by : Darryl C. Melton

Download or read book Remote Sensing and Validation of Surface Currents from HF Radar written by Darryl C. Melton and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radial current data from the CODAR HF radar network around Monterey Bay, California, were analyzed for the period of August-December 1994. Previous studies in Monterey Bay used total vector current data. Long-term percent coverage maps showed that coverage decreased radially, vice range, from the site. Through statistical exarnination of radial current data from the Santa Crux and Point Piiios SeaSonde sites and the Moss Landing CODAR site, comparisons along and around the baseline between systems were used to assess system performance. Significant discrepancies were discovered in the directional information from the Point Pinos and Moss Landing sites. Point Pinos' error was approximately 10 counterclockwise and Moss Landing's error was approximately 5 counterclockwise. RMS differences among even the best correlated baseline pairs were approximately 15 cm/s. Data from the baseline was used to select vector currents when the baseline difference was less than 10 cm/s for comparisons with independent nearby moored current observations. This subsampled data did not show significantly better correlation with the moored data than the full data set. Analysis of the radial error estimates provided by the system algorithms determined that no correlation exists between absolute value difference of the radial velocities along the baselines between systems and these built in error estimates.

Remote Sensing and Validation of Surface Currents from HF Radar

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Author : Darryl C. Melton
Publisher :
ISBN 13 :
Total Pages : 65 pages
Book Rating : 4.:/5 (777 download)

Book Synopsis Remote Sensing and Validation of Surface Currents from HF Radar by : Darryl C. Melton

Download or read book Remote Sensing and Validation of Surface Currents from HF Radar written by Darryl C. Melton and published by . This book was released on 1995 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radial current data from the CODAR HF radar network around Monterey Bay, California, were analyzed for the period of August-December 1994. Previous studies in Monterey Bay used total vector current data. Long-term percent coverage maps showed that coverage decreased radially, vice range, from the site. Through statistical exarnination of radial current data from the Santa Crux and Point Piiios SeaSonde sites and the Moss Landing CODAR site, comparisons along and around the baseline between systems were used to assess system performance. Significant discrepancies were discovered in the directional information from the Point Pinos and Moss Landing sites. Point Pinos' error was approximately 10 counterclockwise and Moss Landing's error was approximately 5 counterclockwise. RMS differences among even the best correlated baseline pairs were approximately 15 cm/s. Data from the baseline was used to select vector currents when the baseline difference was less than 10 cm/s for comparisons with independent nearby moored current observations. This subsampled data did not show significantly better correlation with the moored data than the full data set. Analysis of the radial error estimates provided by the system algorithms determined that no correlation exists between absolute value difference of the radial velocities along the baselines between systems and these built in error estimates.

Scientific and Technical Aerospace Reports

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Author :
Publisher :
ISBN 13 :
Total Pages : 892 pages
Book Rating : 4.:/5 (31 download)

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:

HF Radar Remote Sensing of the Surface Currents in the Strait of Belle Isle

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Author : W. D. Winsor
Publisher : St. John's : Memorial University of Newfoundland, Centre for Cold Ocean Resources Engineering
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (165 download)

Book Synopsis HF Radar Remote Sensing of the Surface Currents in the Strait of Belle Isle by : W. D. Winsor

Download or read book HF Radar Remote Sensing of the Surface Currents in the Strait of Belle Isle written by W. D. Winsor and published by St. John's : Memorial University of Newfoundland, Centre for Cold Ocean Resources Engineering. This book was released on 1985 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Coastal Ocean Dynamics Applications Radar

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Author : Thomas Martin Georges
Publisher :
ISBN 13 :
Total Pages : 352 pages
Book Rating : 4.3/5 (121 download)

Book Synopsis Coastal Ocean Dynamics Applications Radar by : Thomas Martin Georges

Download or read book Coastal Ocean Dynamics Applications Radar written by Thomas Martin Georges and published by . This book was released on 1985 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Evaluation, Comparison and Calibration of Oceanographic Instruments

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Author : Society for Underwater Technology (SUT)
Publisher : Springer Science & Business Media
ISBN 13 : 9780860106692
Total Pages : 286 pages
Book Rating : 4.1/5 (66 download)

Book Synopsis Evaluation, Comparison and Calibration of Oceanographic Instruments by : Society for Underwater Technology (SUT)

Download or read book Evaluation, Comparison and Calibration of Oceanographic Instruments written by Society for Underwater Technology (SUT) and published by Springer Science & Business Media. This book was released on 1986-01-31 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Radar Imaging of the Ocean Waves

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Author : Mikhail B. Kanevsky
Publisher : Elsevier
ISBN 13 : 0080932517
Total Pages : 207 pages
Book Rating : 4.0/5 (89 download)

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

Advances in SAR Remote Sensing of Oceans

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Author : Xiaofeng Li
Publisher : CRC Press
ISBN 13 : 1351235788
Total Pages : 294 pages
Book Rating : 4.3/5 (512 download)

Book Synopsis Advances in SAR Remote Sensing of Oceans by : Xiaofeng Li

Download or read book Advances in SAR Remote Sensing of Oceans written by Xiaofeng Li and published by CRC Press. This book was released on 2018-10-12 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans cover approximately 71% of Earth’s surface, 90% of the biosphere and contains 97% of Earth’s water. Since the first launch of SEASAT satellite in 1978, an increasing number of SAR satellites have or will become available, such as the European Space Agency’s ERS-1/-2, ENVISAT, and Sentinel-1 series; the Canadian RADARSAT-1/-2 and the upcoming RADARSAT Constellation Mission series satellites; the Italian COSMO-SkyMed satellites, the German TERRASAR-X and TANDEM-X, and the Chinese GAOFEN-3 SAR, among others. Recently, European Space Agency has launched a new generation of SAR satellites, Sentinel-1A in 2014 and Sentinel-1B in 2016. These SAR satellites provide researchers with free and open SAR images necessary to carry out their research on the global oceans. The scope of Advances in SAR Remote Sensing of Oceans is to demonstrate the types of information that can be obtained from SAR images of the oceans, and the cutting-edge methods needed for analysing SAR images. Written by leading experts in the field, and divided into four sections, the book presents the basic principles of radar backscattering from the ocean surface; introduces the recent progresses in SAR remote sensing of dynamic coastal environment and management; discusses the state-of-the-art methods to monitor parameters or phenomena related to the dynamic ocean environment; and deals specifically with new techniques and findings of marine atmospheric boundary layer observations. Advances in SAR Remote Sensing of Oceans is a very comprehensive and up-to-date reference intended for use by graduate students, researchers, practitioners, and R&D engineers working in the vibrant field of oceans, interested to understand how SAR remote sensing can support oceanography research and applications.

Remote Sensing Ot the Ocean Surface Using MF/HF Radar

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Author : W. A. Sandham
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (594 download)

Book Synopsis Remote Sensing Ot the Ocean Surface Using MF/HF Radar by : W. A. Sandham

Download or read book Remote Sensing Ot the Ocean Surface Using MF/HF Radar written by W. A. Sandham and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Calibration and Validation of High Frequency Radar for Ocean Surface Current Mapping

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Author : Kyung C. Kim
Publisher :
ISBN 13 : 9781423518273
Total Pages : 92 pages
Book Rating : 4.5/5 (182 download)

Book Synopsis Calibration and Validation of High Frequency Radar for Ocean Surface Current Mapping by : Kyung C. Kim

Download or read book Calibration and Validation of High Frequency Radar for Ocean Surface Current Mapping written by Kyung C. Kim and published by . This book was released on 2004-06-01 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Frequency (HF) radar backscatter instruments are being developed and tested in the marine science and defense science communities for their abilities to sense surface parameters remotely in the coastal ocean over large areas. In the Navy context, the systems provide real-time mapping of ocean surface currents and waves critical for characterizing and forecasting the battle space environment.

Backscatter

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Author :
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (318 download)

Book Synopsis Backscatter by :

Download or read book Backscatter written by and published by . This book was released on 1999 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: