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Abstract : This is a comprehensive investigation of the basic ionospheric processes which produce plasma density structuring. The emphasis of the research efforts was on understanding the formation and evolution of large-scale structures and the embedded km-scale irregularities that disrupt world-wide Air Force communication and navigation systems. Measurement of the temporal variability of a Sun-aligned arc electrodynamics was conducted with the Sondrestrom radar. It was demonstrated experimentally that traveling convection vortices and large plasma jets are able to form large-scale polar cap patches. The analysis of latitudinal profiles of TEC, obtained between 1800 and 2000 LT, indicated that equatorial spread-F develops when there is a sharp increase of TEC in the crests of the anomaly and a decrease near the trough. We have conducted a correlative study using the neutral winds and the irregularity drifts measured near the magnetic equator to show that most of the time drift and wi
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Abstract : This is a comprehensive investigation of the basic ionospheric processes which produce plasma density structuring. The emphasis of the research efforts was on understanding the formation and evolution of large-scale structures and the embedded km-scale irregularities that disrupt world-wide Air Force communication and navigation systems. Measurement of the temporal variability of a Sun-aligned arc electrodynamics was conducted with the Sondrestrom radar. It was demonstrated experimentally that traveling convection vortices and large plasma jets are able to form large-scale polar cap patches. The analysis of latitudinal profiles of TEC, obtained between 1800 and 2000 LT, indicated that equatorial spread-F develops when there is a sharp increase of TEC in the crests of the anomaly and a decrease near the trough. We have conducted a correlative study using the neutral winds and the irregularity drifts measured near the magnetic equator to show that most of the time drift and wi
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