Sökning: "Seyed Soheil Sadeghi"

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  1. 1. Estimation of the absorption of extraterrestrial radio noise using a narrow beam VHF radar at 53.5 MHz in Andenes, Norway

    H-uppsats, Chalmers tekniska högskola/Institutionen för radio- och rymdvetenskap

    Författare :Seyed Soheil Sadeghi; [2008]
    Nyckelord :ionosphere; cosmic radio noise; absorption; solar activity; riometer; radar;

    Sammanfattning : The Earth’s magnetic field works like a shield against the solar wind flux of plasma, but atthe polar regions, where it fails to do so, these charged particles may be guided down tolow altitudes and introduce a lot of impacts on the environment, ranging from the nicecolourful Aurora, to chemical changes in the atmosphere and decrease in the amount ofozone in the middle atmosphere, and from satellite damages to power line cut offs,depending on the type and energy of the particles.Extraterrestrial HF/VHF radio noise from the universe and mainly from our own galaxy iscontinuously coming towards our planet. LÄS MER