350 rub
Journal Electromagnetic Waves and Electronic Systems №11 for 2012 г.
Article in number:
Real-time users alert of the geomagnetic disturbance propagation environment
Keywords: GPS GLONASS satellite navigation geomagnetic disturbances
Authors:
V.V. Demyanov, R.V. Likhota
Abstract:
According some recent results multi-scale ionospheric disturbances affect GPS/GLONASS performance significantly. This affectation has complex character and can not be forecast exactly. Hence the problem of real-time radio-propagation media state monitoring along the satellite vehicle (SV) line-of-sites arises. The aim of this research is to analyze if scintillation index (S4) can be utilized as an adequate indicator in order to provide real-time integrity monitoring of separate SV ranging process under geomagnetic disturbances of radio-propagation media. Real positioning data of ISTP observation site (Institute of Solar and Terrestrial Physics, Irkutsk) were got by means of GPS/GLONASS single-frequency navigation receiver (MRC-19L) and utilized as an experimental data for our research. In order to control concurrent ionospheric electron density distribution during the period under our consideration the Incoherent Scatter Radar "Sounderstorm" (CRI-point at 67º N, 309º E) data set was used. Our results display that there is an obvious trend of declining of the mean SV signal level at the reception point when the intense ionospheric scintillations are present. It proves that S4 - index can be considered as an adequate alert index under complex geomagnetic condition when several geomagnetic events are interfered at the same period of time.
Pages: 56-63
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