• DocumentCode
    1180805
  • Title

    Comparison of Data on the Ionosphere, Sunspots, and Terrestrial Magnetism

  • Author

    Judson, Elbert B.

  • Author_Institution
    National Bureau of Standards, Washington, D.C.
  • Volume
    25
  • Issue
    1
  • fYear
    1937
  • Firstpage
    38
  • Lastpage
    46
  • Abstract
    Ionosphere data of the National Bureau of Standards from 1930 to 1935 are compared with data on the earth´s magnetic field intensity and sunspot numbers. Seasonal variation of F2critical frequency and virtual height are compared with sunspot numbers and magnetic activity. Correlation of annual averages of the ionosphere critical frequencies with sunspot numbers is shown. Variations of midnight F2critical frequencies are compared with variations of sunspot numbers and magnetic activity.
  • Keywords
    Earth; Frequency measurement; Ionization; Ionosphere; Magnetic field measurement; Magnetic fields; NIST; Network address translation; Time measurement; US Department of Commerce;
  • fLanguage
    English
  • Journal_Title
    Radio Engineers, Proceedings of the Institute of
  • Publisher
    ieee
  • ISSN
    0731-5996
  • Type

    jour

  • DOI
    10.1109/JRPROC.1937.228537
  • Filename
    1686255
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1180805