Results 31 to 40 of about 742,768 (286)
Derivation of polar cap AE indices [PDF]
, 1992 P(論文)We have derived on a test basis a geomagnetic index by using presently available data in the southern polar cap. Observatories used here are Scott Base, Dumont d'Urville, Vostok and Mirny.
Saroso, Sarmoko +4 more
core +1 more source
Two‐Dimensional Reconstruction of Ionospheric Plasma Density Variations Using Swarm
Space Weather, 2020 Space weather phenomena such as scintillations of Global Navigation Satellite Systems (GNSS) signals are of increasing importance for aviation, the maritime, and civil engineering industries.
A. Fæhn Follestad +4 more
doaj +1 more source
IMF effect on sporadic-E layers at two northern polar cap sites: Part I – Statistical study [PDF]
Annales Geophysicae, 2006 In this paper we investigate the relationship between polar cap sporadic-E layers and the direction of the interplanetary magnetic field (IMF) using a 2-year database from Longyearbyen (75.2 CGM Lat, Svalbard) and Thule (85.4 CGM Lat, Greenland). It is
M. Voiculescu +4 more
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2023 Dynamic mesoscale flow structures move across the open field line regions of the polar caps and then enter the nightside plasma sheet where they can cause important space weather disturbances, such as streamers, substorms, and omega bands.
Larry R. Lyons +10 more
doaj +1 more source
Akebono observations of polar cap arcs -including review - [PDF]
, 1997 P(論文)The auroral arcs seen at very high latitudes have traditionally been called "high latitude arcs" or "polar cap arcs" and have received much attention during last two decades. In this paper we overview the observational signatures of "polar cap arcs"
Obara, Takahiro
core +1 more source
On the relations between proton influx and D-region electron densities during the polar-cap absorption event of 28-29 October 2003 [PDF]
, 2005 International audienceObservations by incoherent-scatter radar have been applied to explore relationships between the fluxes of incident protons and the resulting D-region electron densities during a polar-cap radio-absorption event.
Birch, M. J. +4 more
core +2 more sources
A new method of studying the relation between ionization rates and radio-wave absorption in polar-cap absorption events [PDF]
, 2005 International audienceDuring polar-cap absorption events, which are caused by the incidence of energetic solar protons, the high-latitude ionospheric D region is extended down to relatively low altitudes. While the incoming proton fluxes may be monitored
Hargreaves, J. K., J. K. Hargreaves
core +2 more sources
Characterising Mesoscale Fast Flow Channels in the Polar Cap Ionosphere [PDF]
, 2021 The large-scale ionospheric convection that circulates in the high-latitude polar caps was initially assumed to be a smooth, laminar flow. However, it has now come to light that this is an oversimplified understanding of what is now known to be a dynamic
Herlingshaw, Katie
core +1 more source
Geophysical Research Letters, 2017 The nonlinear response of the cross polar cap potential (CPCP) to solar wind driving electric field is a well‐known phenomenon. The reasons behind this saturation, however, are still under debate.
M. Myllys, E. K. J. Kipua, B. Lavraud
doaj +1 more source
Polar cap convection patterns inferred from EISCAT observations [PDF]
Annales Geophysicae, 1997 From data of the European incoherent scatter radar EISCAT, and mainly from its tristatic capabilities, statistical models of steady convection in the auroral ionosphere were achieved for various levels of magnetic activity.
C. Peymirat, D. Fontaine
doaj +1 more source