Results 1 to 10 of about 926,286 (251)
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
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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
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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
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Geophysical Research Letters, 2018 The term of “polar cap hot patch” is a newly identified high‐density plasma irregularity at high latitudes, which is associated with high electron temperature and particle precipitation, while a classical polar cap patch has lower electron temperature ...
Yu‐Zhang Ma +5 more
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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
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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
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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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Geophysical Research Letters, 2022 By using a database of 4,634 cold patches (high density and low electron temperature) and 4,700 hot patches (high density and high electron temperature) from Defense Meteorological Satellite Program F16 in 2005–2018 winter months (October–March), we ...
Duan Zhang +8 more
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Polar cap patches observed during the magnetic storm of November 2003: observations and modeling [PDF]
Annales Geophysicae, 2015 We present multi-instrumented measurements and multi-technique analysis of polar cap patches observed early during the recovery phase of the major magnetic storm of 20 November 2003 to investigate the origin of the polar cap patches. During this event,
C. E. Valladares +2 more
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The thermospheric effects of a rapid polar cap expansion [PDF]
Annales Geophysicae, 1998 In a previous publication we used results from a coupled thermosphere-ionosphere-plasmasphere model to illustrate a new mechanism for the formation of a large-scale patch of ionisation arising from a rapid polar cap expansion.
D. W. Idenden
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