Some post-war developments in ground-based radiowave sounding of the ionosphere

Details Some post-war developments in ground-based radiowave sounding of the ionosphere Some post-war developments in ground-based radiowave sounding of the ionosphere

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jatp...36.2183e&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 36, Dec. 1974, p. 2183-2234. USAF-supported research.

Computer Science

Sound

5

Electron Density Profiles, Ground Stations, Ionospheric Sounding, Plasma-Electromagnetic Interaction, Radio Probing, Electric Fields, Electron Energy, High Frequencies, Ion Temperature, Ionospheric Electron Density, Lunar Echoes, Radio Echoes, Wave Interaction

Scientific paper

This paper briefly reviews the theory and practice of four ground-based radio wave methods of sounding the Earth's ionosphere that came into being since the Second World War. Two of the methods, Wave-Interaction (Cross Modulation) and Partial Reflection (Differential Absorption) were devised as means of investigating the D-region of the ionosphere, which is not open to study through conventional HF sounding. The third high-power radar technique discussed is the Moon-Reflection (differential-Faraday rotation) method of measuring the total content of the Earth's ionosphere. This was developed initially to determine the extent of the ionosphere above the F2-layer peak. The fourth technique discussed is the incoherent scatter method of sounding the ionosphere. This provides measurements of electron density, electron and ion temperature, some parameters of the neutral atmosphere (including winds) and electric fields. Incoherent scatter presently enjoys considerable attention as it rivals and complements in situ sampling with rockets and satellites.

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