Riometer measurements of ionospheric radio wave absorption

Details Riometer measurements of ionospheric radio wave absorption Riometer measurements of ionospheric radio wave absorption

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..799r&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 40, July 1978, p. 799-802.

Physics

Ionospheric Propagation, Radio Attenuation, Riometers, D Region, Electron Density Profiles, F Region, Ionospheric Electron Density, Radiation Measurement

Scientific paper

In order to examine the dependence of absorption on height, the ionosphere was divided into two parts, above and below 120 km; absorption was calculated at both levels. Correlation studies were made between absorption and foF2 at 27.6 MHz using riometer and ionosonde data. It was found that when foF2 is over 8 MHz, the F-layer has a significant influence on riometer absorption. When foF2 is about 18 MHz a maximum absorption of about 3 dB is found. It is suggested that the close correlation between foF2 and absorption at low latitudes is caused by the ionizing factors in the F-layer and the lower part of the D-layer (where foF2 is less than 8 MHz). The calculations show that absorption below 60 km has a large influence on total absorption.

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