• DocumentCode
    1188346
  • Title

    Characteristics of the Ionosphere at Washington, D.C., January, 1940, with Predictions for April, 1940

  • Author

    Gilliland, T.R. ; Kirby, S.S. ; Smith, N.

  • Author_Institution
    National Bureau of Standards, Washington, D.C.
  • Volume
    28
  • Issue
    3
  • fYear
    1940
  • fDate
    3/1/1940 12:00:00 AM
  • Firstpage
    139
  • Lastpage
    140
  • Abstract
    Data on the ordinary-wave critical frequencies and virtual heights of the ionospheric layers are presented for the period indicated in the title. The monthly average values of the maximum usable frequencies for undisturbed days, for radio transmission by way of the regular layers is also provided.
  • Keywords
    Electromagnetic wave absorption; Frequency; Hafnium; Ionosphere; NIST; Observatories; Radio transmitters; Reflection; Storms; US Department of Commerce;
  • fLanguage
    English
  • Journal_Title
    Proceedings of the IRE
  • Publisher
    ieee
  • ISSN
    0096-8390
  • Type

    jour

  • DOI
    10.1109/JRPROC.1940.229026
  • Filename
    1687114
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1188346