Polar cap patch prediction in the expanding contracting polar cap paradigm [PDF]
Space Weather, 2019 Space weather can cause serious disturbances of global navigation satellite systems (GNSS) used for positioning and navigation purposes. This paper describes a new method to forecast space weather disturbances on GNSS at high latitudes, in which we ...
Jin, Yaqi +9 more
core +3 more sources
On the Creation, Depletion, and End of Life of Polar Cap Patches [PDF]
Journal of Geophysical Research: Space Physics, 2023 Ionospheric convection patterns from the Super Dual Auroral Radar Network are used to determine the trajectories, transit times, and decay rates of three polar cap patches from their creation in the dayside polar cap ionosphere to their end of life on ...
Lorentzen, Dag Arne +13 more
core +8 more sources
Do the Throat Auroras Create Polar Cap Patches?
Geophysical Research Letters, 2023 Throat auroras and polar cap patches are common phenomena in the polar ionosphere resulting from magnetosphere‐ionosphere coupling. A campaign was organized, with all‐sky imagers at Yellow River Station, the European Incoherent Scatter Svalbard Radar ...
Duan Zhang +12 more
doaj +4 more sources
Observations and modeling of scintillation in the vicinity of a polar cap patch
Journal of Space Weather and Space Climate, 2022 Small-scale ionospheric plasma structures can cause scintillation in radio signals passing through the ionosphere. The relationship between the scintillated signal and how plasma structuring develops is complex.
Lamarche Leslie J. +2 more
doaj +2 more sources
Relationship of Theoretical Patch Climatology to Polar Cap Patch Observations [PDF]
Radio Science, 1996 During a southward orientation of the interplanetary magnetic field (IMF), patches are often observed moving antisunward across the polar cap.
Sojka, Jan Josef +5 more
core +4 more sources
Positive storm effects in the dayside polar ionospheric F-region observed by EISCAT and ESR during the magnetic storm of 15 May 1997 [PDF]
Annales Geophysicae, 2002 EISCAT/ESR radar data and in situ FAST and POLAR satellite observations are coordinately analyzed to investigate positive ionospheric storm effects in the dayside upper F-region in both the polar cap and the auroral oval during the magnetic storm ...
S. Y. Ma +5 more
doaj +3 more sources
Seasonal influence on polar cap patches in the high-latitude nightside ionosphere [PDF]
Journal of Geophysical Research: Space Physics, 2010 The influence of the season on the patch-to-background density ratio of polar cap patches in the nightside ionosphere was observed above northern Scandinavia around solar maximum (1999–2001).
Wood, Alan +4 more
core +2 more sources
Review of ionospheric effects of solar wind magnetosphere coupling in the context of the expanding contracting polar cap boundary model [PDF]
, 2006 This paper reviews the coupling between the solar wind, magnetosphere and ionosphere. The coupling between the solar wind and Earth’s magnetosphere is controlled by the orientation of the Interplanetary Magnetic Field (IMF).
Milan, S. E. +3 more
core +4 more sources
Morphology of polar cap patch activity [PDF]
Radio Science, 1999 For the period July 1, 1989, to June 30, 1990, for high solar activity, ƒ0F2 data were recorded by the Digital Ionospheric Sounding Systems from two Qaanaaq and Sondrestromfjord; ionospheric UHF scintillation data were recorded from Thule; and airglow images were recorded from Qaanaaq.
B. S. Dandekar, T. W. Bullett
openaire +2 more sources
Periodicities of polar cap patches [PDF]
Journal of Geophysical Research: Space Physics, 2013 A highly sensitive all‐sky electron multiplier charge‐coupled device airglow imager has been operative in Longyearbyen, Norway since October 2011. The imager captures 630.0 nm all‐sky images with an exposure time of 4 s, which is about 10 times shorter than that achieved by conventional cooled CCD imagers.
K. Hosokawa +3 more
openaire +1 more source