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    High-latitude over-the-horizon radar applications

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    Author
    Theurer, Timothy E.
    Chair
    Bristow, William
    Committee
    Thorsen, Denise
    Hawkins, Joseph
    Watkins, Brenton
    Keyword
    over-the-horizon radar
    polar ionosphere
    Metadata
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    URI
    http://hdl.handle.net/11122/11294
    Abstract
    Over-the-horizon radar (OTHR) systems that operate at high-latitudes often must contend with multipath and pronounced diffusive scattering effects produced by the anisotropic, birefringent, and heterogeneous nature of the ionosphere. In this thesis, radar performance at high-latitudes is quantified and several applications for either mitigating the deleterious effects of multipath and diffusive scattering or deriving information about the state of the ionosphere are proposed. The first application is inspired by adaptive optics techniques in other fields and involves the coherent summation of the received plane wave spectrum in order to improve angular resolution and array gain. The second application involves deriving ionospheric E x B drift from applying spatial correlation analysis to ground clutter echoes. The third application is the development of a new spatial adaptive processing technique designed specifically to preserve the Doppler spectrum of angle-Doppler coupled clutter like that observed at high-latitudes.
    Description
    Dissertation (Ph.D.) University of Alaska Fairbanks, 2020
    Table of Contents
    1. Introduction -- 2. Scintillation correction in phased array high-frequency radar -- 3. Ground clutter spatial correlation analysis: transverse ionospheric drift velocity -- 4. MV-SAP: Preserving angle-doppler coupled clutter -- 5. Conclusions & future work -- Appendix: Alternative derivation of ground clutter MCF
    Date
    2020-05
    Type
    Dissertation
    Collections
    Engineering

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