Fine structure in the ionospheric D-region

Details Fine structure in the ionospheric D-region Fine structure in the ionospheric D-region

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.292..221t&link_type=abstract

Nature, vol. 292, July 16, 1981, p. 221-223.

Computer Science

Sound

10

Atmospheric Scattering, D Region, Fine Structure, Ionospheric Propagation, Radio Echoes, Atmospheric Turbulence, Ion Density (Concentration), Ionospheric Currents, Ionospheric Electron Density, Ionospheric Sounding, Radio Wave Refraction, Rocket Sounding

Scientific paper

The 'partial reflection' method developed by Gardner and Pawsey (1953) turned out to be a useful tool for studies of the ionospheric D-region. A comparison is conducted of the observations of weak radio echoes from the ionospheric D-region, with model computations of radio wave scattering. The model computations are based on volume scattering from irregular ionospheric structures measured in situ in a sounding rocket. The experimental data were obtained from a rocket-borne electrostatic ion-current probe combined with simultaneous recordings of partial reflections. It is found that the intensity and height variation of partial reflections measured during the rocket flight are consistent with volume scattering from the ionospheric irregularities measured by the electrostatic probe in the rocket. The power spectra of ion density fluctuations derived from the rocket data indicate that these fluctuations are caused by turbulence in the neutral air. It is, therefore, concluded that such turbulence is an important source of partial reflections.

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