GPS Amplitude and Phase Scintillation Associated with Poleward Moving Sun Aligned Arcs
Abstract
An All-Sky imager at Resolute Bay, Canada observed many cases of Poleward Moving Sun Aligned Arcs (PMSAAs) during the Winter of 2010. Three Global Positioning System (GPS) receivers of the Canadian High Arctic Ionospheric Network (CHAIN), intersecting the field of view of the imager, showed rapid fluctuations of signal amplitude and phase (scintillation) associated with many of the PMSAAs. These fluctuations were intermittent (durations <10 min) and seen near simultaneously on many available ray-paths irrespective of the orientation of the ray-path with the arc and its motion. This observation is contrary to the well accepted hypothesis that scintillation producing irregularity is formed only in certain parts of the plasma structure. Spectral analysis of the amplitude and phase scintillation associated with PMSAAs showed different spectral slope compared to other forms of scintillations. These results along with the fact that scintillation is seen on all available ray-paths suggests a different mechanism for the generation of the scintillation. Implication of the results for the understanding of the scintillation producing irregularities will be discussed.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2013
- Bibcode:
- 2013AGUFMSA21B2020J
- Keywords:
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- 2439 IONOSPHERE Ionospheric irregularities;
- 6984 RADIO SCIENCE Waves in plasma;
- 2475 IONOSPHERE Polar cap ionosphere;
- 2494 IONOSPHERE Instruments and techniques