Physics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54..979b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, no. 7-8, July-Aug. 1992, p. 979-981, 983-987.
Physics
1
Faraday Effect, Ionospheric Propagation, Periodic Variations, Polarization (Waves), Scintillation, Annual Variations, Diurnal Variations, Solar Activity Effects, Solar Cycles, Spread F
Scientific paper
The short- and long-term characteristics of Faraday polarization fluctuations (FPFs) related to rapid amplitude scintillations are examined emphasizing diurnal, seasonal, and solar-cycle fluctuations. The data are taken from a geostationary satellite using a 136.1124 MHz beacon signal within the region of the northern equatorial anomaly. FPFs are shown to be essentially nocturnal with two nightly peaks, and FPF events tend to last less than one hour. Maximum occurrences are noted during the equinoxes, and a direct correlation is described between high sunspot activity and high FPF occurrence. FPF activity is also shown to be correlated with ambient ionization and range-type spread-F occurrences. The present results suggest that Faraday fluctuations are manifestations of plasma-bubble dynamics in the equatorial ionosphere.
Bhuyan P. K.
Huang Yinn-Nien
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