On a new process for cusp irregularity production [PDF]
Annales Geophysicae, 2008 Two plasma instability mechanisms were thought until 2007 to dominate the formation of plasma irregularities in the F region high latitude and polar ionosphere; the gradient-drift driven instability, and the velocity-shear driven instability.
H. C. Carlson +3 more
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Space weather challenges of the polar cap ionosphere [PDF]
Journal of Space Weather and Space Climate, 2013 This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012.
Spogli Luca +5 more
doaj +5 more sources
Recently research advances on the polar cap patches
地球与行星物理论评, 2023 The polar cap patch is a common ionospheric structure. It often appears in the F region of the ionosphere over the polar caps; these patches are usually characterized by electron densities that can be even twice greater than that of the surrounding area.
Yong Wang +4 more
doaj +2 more sources
On the diurnal variability in F2-region plasma density above the EISCAT Svalbard radar [PDF]
Annales Geophysicae, 2008 Two long runs of EISCAT Svalbard Radar (ESR), in February 2001 and October 2002, have been analysed with respect to variability in the F2 region peak density and altitude.
J. Moen +5 more
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On the possible role of cusp/cleft precipitation in the formation of polar-cap patches [PDF]
Annales Geophysicae, 1999 The work describes experimental observations of enhancements in the electron density of the ionospheric F-region created by cusp/cleft particle precipitation at the dayside entry to the polar-cap convection flow.
I. K. Walker +5 more
doaj +3 more sources
Plasma structuring within an expanded polar cap and cusp studied with the SS-520-3 sounding rocket [PDF]
Earth, Planets and SpaceThe SS-520-3 sounding rocket was launched on November 4th, 2021 as part of the Grand Challenge Initiative - Cusp from Ny-Ålesund, Svalbard. The rocket was launched into the cusp ionosphere during the main phase of a geomagnetic storm.
L. M. Buschmann +12 more
doaj +3 more sources
Motion of the dayside polar cap boundary during substorm cycles: II. Generation of poleward-moving events and polar cap patches by pulses in the magnetopause reconnection rate [PDF]
Annales Geophysicae, 2005 Using data from the EISCAT (European Incoherent Scatter) VHF and CUTLASS (Co-operative UK Twin-Located Auroral Sounding System) HF radars, we study the formation of ionospheric polar cap patches and their relationship to the magnetopause reconnection ...
M. Lockwood +9 more
doaj +4 more sources
Global Positioning System (GPS) Scintillation Associated with a Polar Cap Patch [PDF]
Remote Sensing, 2021 A Global Positioning System (GPS) network in the polar cap, along with ionosonde and SuperDARN radar measurements, are used to study GPS signal amplitude and phase scintillation associated with a polar cap patch.
Jayachandran P. Thayyil +7 more
doaj +2 more sources
A Case Study of Polar Cap Sporadic-E Layer Associated with TEC Variations
Remote Sensing, 2021 The Sporadic-E (Es) layer is an often-observed phenomenon at high latitudes; however, our understanding of the polar cap Es layer is severely limited due to the scarce number of measurements.
Yong Wang +6 more
doaj +1 more source
HF radar polar patch formation revisited: summer and winter variations in dayside plasma structuring [PDF]
Annales Geophysicae, 2002 Three intervals of polar patch formation, as observed by the CUTLASS Finland HF coherent radar, are presented. Simultaneous observations from a vertical ionosonde located at Longyearbyen on Svalbard, situated in the dayside convection throat region,
S. E. Milan +3 more
doaj +1 more source