Results 11 to 20 of about 203,115 (295)
AMPERE polar cap boundaries [PDF]
Annales Geophysicae, 2020 The high-latitude atmosphere is a dynamic region with processes that respond to forcing from the Sun, magnetosphere, neutral atmosphere, and ionosphere. Historically, the dominance of magnetosphere–ionosphere interactions has motivated upper atmospheric
A. G. Burrell +6 more
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GPS scintillations associated with cusp dynamics and polar cap patches [PDF]
Journal of Space Weather and Space Climate, 2017 This paper investigates the relative scintillation level associated with cusp dynamics (including precipitation, flow shears, etc.) with and without the formation of polar cap patches around the cusp inflow region by the EISCAT Svalbard radar (ESR) and ...
Jin Yaqi +5 more
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Annales Geophysicae, 2005 This study uses digital ionosonde data from a cusp latitude station (Cambridge Bay, 77° CGM lat.) to study the convection into the polar cap. Days when the IMF magnetic field was relatively steady were used. On many days it was possible to distinguish
J. MacDougall, P. T. Jayachandran
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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
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Uranus's northern polar cap in 2014. [PDF]
Geophys Res Lett, 2018 AbstractIn October and November 2014, spectra covering the 1.436 to 1.863‐μm wavelength range from the SINFONI Integral Field Unit Spectrometer on the Very Large Telescope showed the presence of a vast bright north polar cap on Uranus, extending northward from about 40°N and at all longitudes observed.
Toledo D +5 more
europepmc +6 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
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Storm time polar cap expansion: interplanetary magnetic field clock angle dependence [PDF]
Annales Geophysicae, 2023 It is well known that the polar cap, delineated by the open–closed field line boundary (OCB), responds to changes in the interplanetary magnetic field (IMF).
B. Tulegenov +6 more
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The pulsed nature of the nightside contribution to polar cap convection: repetitive substorm activity under steady interplanetary driving [PDF]
Annales Geophysicae, 2012 The aim of this study is to investigate the relative contributions of dayside and nightside processes to the spatial and temporal structure of polar cap plasma convection. The central parameter is the cross-polar cap potential (CPCP). Selecting a 10-
P. E. Sandholt +2 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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Determining decay rates of polar cap plasma using bservations of polar cap patches [PDF]
, 2015 Polar cap patches are large scale structures occurring in the high-latitude ionosphere. They are regions of enhanced plasma density of at least twice the background density, and they are often observed in the polar cap region. The primary decay mechanism
Hardwick, L, Wood, A
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