Further comments on quasi-periodic scintillations in radio-satellite transmissions

Details Further comments on quasi-periodic scintillations in radio-satellite transmissions Further comments on quasi-periodic scintillations in radio-satellite transmissions

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38..443s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 38, Apr. 1976, p. 443-445.

Physics

1

Doppler Effect, Ionospheric Propagation, Radio Transmission, Satellite Transmission, Scintillation, Ats 5, Ats 6, F Region, Periodic Variations, Radio Telescopes

Scientific paper

It is noted that some regular quasi-periodic (QP) amplitude scintillations in radio-satellite transmissions have been attributed to a nonionospheric mechanism, viz., a Doppler frequency shift due to interference from other satellite transmissions. This article discusses a second class of more elusive QP scintillations which are probably associated with ionospheric inhomogeneities in the F-region. Pen recordings of ATS-5 and ATS-6 geostationary-satellite transmissions are examined which show that Doppler-shift QP scintillations are developed on a time scale of seconds and are observed at a single frequency, while the ionosphere-related ones are developed on a time scale of minutes and have been observed simultaneously at as many as five different frequencies. It is concluded that the multifrequency observation and the relatively long duration of the second class of QP scintillations eliminate interfering satellite transmissions as their source, but it is stressed that all QP scintillations should not be associated with various ionospheric phenomena.

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