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    Characterization of the ionosphere above the Murchison Radio Observatory using the Murchison Widefield Array

    Access Status
    Fulltext not available
    Authors
    Jordan, C.
    Murray, S.
    Trott, Cathryn
    Wayth, R.
    Mitchell, D.
    Rahimi, M.
    Pindor, B.
    Procopio, P.
    Morgan, J.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jordan, C. and Murray, S. and Trott, C. and Wayth, R. and Mitchell, D. and Rahimi, M. and Pindor, B. et al. 2017. Characterization of the ionosphere above the Murchison Radio Observatory using the Murchison Widefield Array. Monthly Notices of the Royal Astronomical Society. 471 (4): pp. 3974-3987.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stx1797
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DE140100316
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/57245
    Collection
    • Curtin Research Publications
    Abstract

    We detail new techniques for analysing ionospheric activity, using Epoch of Reionisation (EoR) datasets obtained with the Murchison Widefield Array (MWA), calibrated by the `Real-Time System' (RTS). Using the high spatial- and temporal-resolution information of the ionosphere provided by the RTS calibration solutions over 19 nights of observing, we find four distinct types of ionospheric activity, and have developed a metric to provide an `at a glance' value for data quality under differing ionospheric conditions. For each ionospheric type, we analyse variations of this metric as we reduce the number of pierce points, revealing that a modest number of pierce points is required to identify the intensity of ionospheric activity; it is possible to calibrate in real-time, providing continuous information of the phase screen. We also analyse temporal correlations, determine diffractive scales, examine the relative fractions of time occupied by various types of ionospheric activity, and detail a method to reconstruct the total electron content responsible for the ionospheric data we observe. These techniques have been developed to be instrument agnostic, useful for application on LOFAR and SKA-Low.

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