Application of small-size antennas for estimation of angles of arrival of HF signals scattered by ionospheric irregularities

Guo, Qiang; Galushko, V. G.; KASHCHEYEV, S.B.; Zheng, Yu

doi:10.1016/j.asr.2018.02.014

Cited by 1 publication

(1 citation statement)

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“…The second type is a relatively broad spectrum with the DFS variations smaller than the spectral width. Using our many years of experience (Kascheev et al, 2013;Qiang et al, 2018;Zalizovski et al, 2015Zalizovski et al, , 2020, we can claim that the signals with such morphological features usually appear due to aspect-sensitive scattering on field-aligned plasma irregularities. Since the processing techniques were developed for the mirror reflected signals on quasi-vertical radio paths, the scattered signals were excluded from further analysis.…”

Section: Resultsmentioning

confidence: 94%

Multi‐Position Facility for HF Doppler Sounding of Ionospheric Inhomogeneities in Ukraine

et al. 2021

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Traveling ionospheric disturbances (TIDs) were discovered long time ago (Hines, 1960;Hooke, 1968). Their propagation leads to variations in the parameters of radio signals propagating in the ionosphere. The TID parameters satisfy the dispersion equation for atmospheric gravity waves (AGWs) in the thermosphere (Hooke, 1977;Gershman et al., 1984;Gossard & Hooke, 1978) and hence TIDs represent the ionospheric plasma response to AGWs. Identification of TIDs with AGWs, in turn, makes possible studying AGWs by means of radio techniques. Traditionally, AGWs are separated into the small-, medium-and large-scale ranges according to horizontal wavelengths of ≤100, 100-1,000, and >1,000 km, respectively (Francis, 1975;Georges, 1968;Hocke & Schlegel, 1996). AGWs may be excited by a wide variety of natural and artificial sources. Some of these sources like earthquakes, volcanic eruptions, cyclones, hurricanes and other meteorological phenomena, powerful explosion and rocket launches (

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Section: Resultsmentioning

confidence: 94%