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    Improving HF radar estimates of surface currents using signal quality metrics, with application to the MVCO high-resolution radar system

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    jtech-d-11-00160%2E1.pdf (4.519Mb)
    Date
    2012-09
    Author
    Kirincich, Anthony R.  Concept link
    de Paolo, Tony  Concept link
    Terrill, Eric  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5505
    As published
    https://doi.org/10.1175/JTECH-D-11-00160.1
    DOI
    10.1175/JTECH-D-11-00160.1
    Keyword
     Coastal flows; Currents; Data processing; Data quality control; In situ atmospheric observations; Remote sensing 
    Abstract
    Estimates of surface currents over the continental shelf are now regularly made using high-frequency radar (HFR) systems along much of the U.S. coastline. The recently deployed HFR system at the Martha’s Vineyard Coastal Observatory (MVCO) is a unique addition to these systems, focusing on high spatial resolution over a relatively small coastal ocean domain with high accuracy. However, initial results from the system showed sizable errors and biased estimates of M2 tidal currents, prompting an examination of new methods to improve the quality of radar-based velocity data. The analysis described here utilizes the radial metric output of CODAR Ocean Systems’ version 7 release of the SeaSonde Radial Site Software Suite to examine both the characteristics of the received signal and the output of the direction-finding algorithm to provide data quality controls on the estimated radial currents that are independent of the estimated velocity. Additionally, the effect of weighting spatial averages of radials falling within the same range and azimuthal bin is examined to account for differences in signal quality. Applied to two month-long datasets from the MVCO high-resolution system, these new methods are found to improve the rms difference comparisons with in situ current measurements by up to 2 cm s−1, as well as reduce or eliminate observed biases of tidal ellipses estimated using standard methods.
    Description
    Author Posting. © American Meteorological Society, 2012. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 29 (2012): 1377–1390, doi:10.1175/JTECH-D-11-00160.1.
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    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Atmospheric and Oceanic Technology 29 (2012): 1377–1390
     

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