Mid-latitude amplitude scintillation of GPS signals and GPS performance slips |
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Authors: | EL Afraimovich EI AstafyevaVV Demyanov IF Gamayunov |
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Institution: | Institute of Solar-Terrestrial Physics, Russian Academy of Sciences, Post Box 291, 664033 Irkutsk, Russia |
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Abstract: | Degradation of transionospheric radio signals and operation failures during ionospheric disturbances constitute a crucial factor of space weather influence on radio engineering satellite systems performance. We found that during the main phase of strong magnetic storms in 2000–2003 when the auroral oval expands into mid-latitudes, its southern boundary develops a region with intense small-scale electron density irregularities. Such irregularities may cause strong amplitude scintillations of GPS signals at both GPS operating frequencies. The another consequence of it was significant random GPS signal phase fluctuations, breaking-down of signal tracking, and sharp increasing of GPS positioning errors as a result. |
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Keywords: | Ionosphere GPS Geomagnetic storms Ionospheric irregularities Amplitude scintillation |
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