• DocumentCode
    1045261
  • Title

    A new sporadic layer providing VLF propagation

  • Author

    Ortner, J. ; Egeland, A. ; Hultqvist, B.

  • Author_Institution
    Kiruna Geophys. Observatory of the Royal Swedish Academy of Science, Kiruna, Sweden
  • Volume
    8
  • Issue
    6
  • fYear
    1960
  • fDate
    11/1/1960 12:00:00 AM
  • Firstpage
    621
  • Lastpage
    628
  • Abstract
    During two periods in May and July, I959, following strong solar flares, the signal strength of receptions at Kiruna of VLF transmissions from Rugby (16 kc) showed no or only slight diurnal variation. It is proposed that the change of the diurnal variation is due to the production by solar protons of an ionized layer very deep in the atmosphere, the electron density of which is sufficient for reflection of very long waves but too low to cause measurable nondeviative absorption in the HF band at geomagnetic latitudes lower than approximately 60\\deg .
  • Keywords
    Earth-ionosphere waveguide; Ionospheric propagation; Plasma generation; Solar radiation; VLF radio propagation; Absorption; Atmosphere; Atmospheric measurements; Density measurement; Electrons; Geomagnetism; Hafnium; Production; Protons; Reflection;
  • fLanguage
    English
  • Journal_Title
    Antennas and Propagation, IRE Transactions on
  • Publisher
    ieee
  • ISSN
    0096-1973
  • Type

    jour

  • DOI
    10.1109/TAP.1960.1144904
  • Filename
    1144904
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1045261