Drift analysis of random and quasiperiodic scintillations in the ionosphere

Details Drift analysis of random and quasiperiodic scintillations in the ionosphere Drift analysis of random and quasiperiodic scintillations in the ionosphere

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..723h&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 43, July 1981, p. 723-733. Research supported by the Science Research Coun

Physics

10

Earth Atmosphere, Ionospheric Drift, Ionospheric Electron Density, Ionospheric Propagation, Scintillation, Traveling Ionospheric Disturbances, Ats 6, Drift Rate, E Region, Radio Signals, Random Processes, Signal Fading

Scientific paper

Radio signals in the VHF/UHF range from the geostationary satellite ATS-6 were recorded using a system of three spaced antennas at Slough. Simultaneously, the integrated electron content (TEC) was monitored between the satellite and ground. Full correlation analysis and similar fade techniques were used to deduce the drift velocities of irregularities responsible for random and quasiperiodic (QP) 'ringing' scintillations. Similar drift velocities were found for the disturbances responsible for both types of scintillations at the times when QP and random scintillations occurred in a sequential pattern. A southward-drifting disturbance was responsible for rare, multiple QP scintillations which were followed by large scale fluctuations in electron density. In general, QP-scintillation-producing irregularities drifted southward, with velocities whose median magnitude and azimuth were 64 m/s and 178 E of N respectively. The sequential occurrence pattern of QP-random scintillations as well as the time delay between occurrences of large fluctuations in TEC and QP scintillations, appear to be consistent with a reflection model of generation of the ringing fading of the signal.

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