Radio noise intensity at guard bands for HF standard waves in the topside ionosphere measured by ISS-b

Details Radio noise intensity at guard bands for HF standard waves in the topside ionosphere measured by ISS-b Radio noise intensity at guard bands for HF standard waves in the topside ionosphere measured by ISS-b

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989crlj...36...55i&link_type=abstract

Communications Research Laboratory, Journal (ISSN 0914-9260), vol. 36, July 1989, p. 55-67.

Physics

Atmospherics, Ionospheric Propagation, Noise Intensity, Ionospheric Ion Density, Radio Frequency Interference

Scientific paper

The ISS-b was launched in 1978, and since then has measured radio noise in guard bands for HF standard waves. This paper presents statistical characteristics of radio noise intensity obtained by analyzing one year of data for 2.5 MHz, 5.0 MHz, 10 MHz, and 25 MHz from ISS-b measurements for the year 1979. The radio noise intensity is found to be strongly dependent on the critical frequency of the ionospheric F2 layer, fo F2, and also to be lower than the noise intensities at frequencies outside the guard bands. This indicates that the main contribution to radio noise exceeding the galactic noise level comes from the standard waves themselves.

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