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Airglow Patches in the Polar Cap Region: A Review
Space Science Reviews, 2019Polar cap airglow patches have been known as regions of enhanced 630.0 nm airglow detected by ground-based all-sky imagers at the polar cap latitudes well inside the main auroral oval. Although they were already recognized almost four decades ago as counterparts of polar cap (plasma density) patches, such airglow observations had not been utilized ...
Keisuke Hosokawa +2 more
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Polar Cap Patches and the Tongue of Ionization: A Survey of GPS TEC Maps From 2009 to 2015 [PDF]
Geophysical Research Letters, 2016 The source and structuring mechanisms for F region density patches have been subjects of speculation and debate for many years. We have made a survey of mappings of total electron content (TEC) between the years 2009 and 2015 from the web‐based Madrigal ...
Jan Sojka +2 more
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Signatures of polar cap patches in ground ionosonde data
Radio Science, 1997The interpretation of localized density structures in the high‐latitude ionosphere as observed by ground ionosondes is a task that is complicated by the complexity of those structures and by the variety of processes that ionosonde waves undergo. To aid interpretation, we have performed a first‐order analysis of the shapes of traces seen in ionosonde ...
H. G. James, J. W. MacDougall
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Polar-cap patches as a source of Doppler spread in the polar-cap: a case study
• Doppler curve for ePOP-RRI-CLY conjunction shows dramatic variability in ~500 Hz, especially during 100-250 s elapsed. • Received signal power also shows an eastward shift in the expected position of CLY's peak power. • Consistent with QAN-ALE deviations in Fig. 2.Gareth William Perry +3 more
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Modeling the formation of polar cap patches using large plasma flows
Radio Science, 1996Recent measurements made with the Sondrestrom incoherent scatter radar have indicated that the formation of polar cap patches can be closely associated with the flow of a large plasma jet. In this paper, we report the results of a numerical study to investigate the role of plasma jets on patch formation, to determine the temporal evolution of the ...
C. E. Valladares +3 more
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Interhemispheric Study of Polar Cap Patch Occurrence Based on Swarm in Situ Data
Journal of Geophysical Research: Space Physics, 2017Yaqi Jin +2 more
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On the MLT Distribution of F Region Polar Cap Patches at Night
Geophysical Research Letters, 2007Dag A Lorentzen +2 more
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On the Symmetry of Ionospheric Polar Cap Patch Exits Around Magnetic Midnight
Journal of Geophysical Research: Space Physics, 2015Keisuke Hosokawa, Lasse Clausen, J Moen
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Substorm Onset and Expansion Phase Intensification Precursors Seen in Polar Cap Patches and Arcs
Journal of Geophysical Research: Space Physics, 2013Stephen B Mende +2 more
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