Calibration and Validation of High Frequency Radar for Ocean Surface Current Mapping PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Calibration and Validation of High Frequency Radar for Ocean Surface Current Mapping PDF full book. Access full book title Calibration and Validation of High Frequency Radar for Ocean Surface Current Mapping by Kyung C. Kim. Download full books in PDF and EPUB format.
Author: Kyung C. Kim
Publisher:
ISBN: 9781423518273
Category :
Languages : en
Pages : 92
Get Book Here
Book Description
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.
Author: Kyung C. Kim
Publisher:
ISBN: 9781423518273
Category :
Languages : en
Pages : 92
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
Get Book Here
Book Description
High frequency (HF) radar and its application to mapping ocean surface currents is a relatively new field of study in oceanography. Nevertheless, this scientific field produces real, tangible, accurate real-time results readily available to the military operational planner. The information gained through this process aids in the planning and execution of littoral operations via the development of the battle-space environment. Additionally, commercial use of this information can aide in the containment of coastal oil spills, efforts in search and rescue, and the execution of coastal engineering projects. Indeed, the utilization of High Frequency radar in the ocean environment has many beneficial qualities used by a wide variety of organizations. This study focuses on the validation aspects of High Frequency radar through the use of four drifters placed in-situ from 23-27 January 2008 on the Central California Coast from Monterey to San Francisco. A second experiment was conducted from 01-10 April 2008 involving 32 drifters placed west of the San Francisco Bay. Various statistical comparisons of radial current velocity data from 12 CODAR (Coastal Ocean Dynamics Application Radar) stations to the radial velocity data of each of the drifters will be analyzed.
Author:
Publisher:
ISBN:
Category : Computer programs
Languages : en
Pages : 103
Get Book Here
Book Description
The use of the HF radar to measure and map surface currents has proliferated along the coastlines of many countries for purposes of Search and Rescue, Oil Spill Management, Oceanographic and Fishery Science studies. In the US Navy, these surface current maps are being evaluated for operational use in real-time data assimilating coastal circulation models, and direct monitoring tools in environmentally sensitive operating areas. The SeaSonde HF radar, a DF system, was considered in this study. It uses the MUSIC algorithm to recover bearings from the Doppler backscatter spectrum of the sea surface. By varying the radial and antenna patterns, the simulated backscatter spectra were passed through the SeaSonde software suite for radial pattern recovery. This unprecedented approach directly evaluated SeaSonde's MUSIC, and the associated uncertainties were examined against the simulated inputs of (1) fixed amplitude and phase deviations from the ideal antenna pattern, (2) measured antenna patterns and (3) decreasing SNR. It was found that using the measured antenna pattern to recover radials yielded least uncertainty, but a definitive prediction of MUSIC's radial-recovery capability in relation to the pattern's complex amplitude and phase structure remained illusive. The results highlighted the need to calibrate the military's DF-systems for accurate azimuth recovery.
Author: Antony Joseph
Publisher: Newnes
ISBN: 0123914280
Category : Science
Languages : en
Pages : 447
Get Book Here
Book Description
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
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 77
Get Book Here
Book Description
Partial contents include: (1) HF Radar Instruments, Past to Present; (2) Mapping Surface Currents in Monterey Bay with CODAR-type HF Radar; (3) The Coastal Jet: Observations of Surface Currents over the Oregon Continental Shelf from HF Radar; (4) Tidal and Wind-driven Currents from OSCR; (5) Larval Transport and Coastal Upwelling: an Application of HF Radar in Ecological Research; (6) Evolution of Bearing Determination in HF Current Mapping Radars; (7) Shipboard Deployment of a VHF OSCR System for Measuring Offshore Currents; and (8) Experience with Shipborne Measurements of Surface Current Fields by Radar.
Author: Darryl C. Melton
Publisher:
ISBN:
Category :
Languages : en
Pages : 65
Get Book Here
Book Description
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.
Author: Integrated Ocean Observing System (U.S.)
Publisher:
ISBN:
Category : Ocean circulation
Languages : en
Pages : 60
Get Book Here
Book Description
"This manual is a living document that reflects the state-of-the-art QC testing procedures for HF radar surface currents observations. It is written for the experienced operator but also provides examples for those who are just entering the field"--Page 3. [doi:10.7289/V5T43R96 (https://doi.org/10.7289/V5T43R96)].
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
HF surface wave radar for ocean wave and current measurements began with collaborative work at Stanford University and Scripps Institution of Oceanography in the late 1960's. Two of the participants in this project (Drs. Teague and Vesecky) have worked with HF radar observations of the ocean since these early experiments. Under this grant a new HF radar design was begun and some prototype construction completed. This work led to construction of a full scale prototype that is now being tested over Monterey Bay, California from a field site kindly provided at the Long Marine Laboratory of the University of California at Santa Cruz. Initial results, including radial current field maps at four frequencies and variations of currents with time, were presented at the American Geophysical Union Fall Meeting in San Francisco, December, 1996. This final report is a presentation of results under the funding from ONR grant N00014-94-1-0371. It contains an overview of the radar design and its implementation in hardware as well as some preliminary results on vertical shear in the surface current field over Monterey Bay CA.
Author: Thomas Martin Georges
Publisher:
ISBN:
Category : Ocean currents
Languages : en
Pages : 352
Get Book Here
Book Description
Author: Daniel Martin Fernandez
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
Get Book Here
Book Description
