Sounding of HF heating-induced artificial ionospheric disturbances by navigational satellite radio transmissionsстатья
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Дата последнего поиска статьи во внешних источниках: 18 марта 2016 г.
Аннотация:During experiments carried out in 2009–2011 the midlatitude ionosphere was
modified by powerful HF pulses from the Sura heating facility located near
Nizhny Novgorod (Russia) and operated by the Radio Physical Research Institute.
GPS/GLONASS and Parus/Tsikada satellite radio transmissions responding to the
heating-induced disturbances in electron density were analyzed. The variations in the total
electron content (TEC), which are proportional to the reduced phase of navigational
signals, were studied for various schemes of radiation of the heating wave. The variations
in TEC (their amplitudes and temporal behavior) caused by HF heating are identified in
several examples. The TEC spectra contain frequency components corresponding to the
modulation periods of the heating wave. For the first time, the spatial structure of the
wave disturbances generated in the ionosphere by high-power radio waves radiated by
the Sura heating facility with a square wave modulation of the effective radiated power
at a frequency lower than or of the order of the Brunt-Vaisala frequency of the
neutral atmosphere is imaged using the method of low-orbital radio tomography and
GPS/GLONASS data.