• Ionospheric refraction in radio source observations at long radio wavelengths

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    • Abstract

       

      Ionospheric refraction effects encountered in radio source observations in the 30 to 75 MHz range with the Clark Lake TPT telescope are discussed. It is found that simple calibration procedures are sufficient to provide positions of unknown sources with an accuracy of approximately one arcmin. Observations made near sunrise, or during disturbed ionospheric conditions must be discarded. If no corrections are applied, RMS errors of a few arcmin are to be expected.

    • Author Affiliations

       

      W. C. Erickson1

      1. Clark Lake Radio Observatory, Astronomy Program, University of Maryland, College Park, MD - 20742, USA
    • Dates

       
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