Results 21 to 30 of about 203,115 (295)

Central polar cap convection response to short duration southward Interplanetary Magnetic Field [PDF]

Annales Geophysicae, 2000
Central polar cap convection changes associated with southward turnings of the Interplanetary Magnetic Field (IMF) are studied using a chain of Canadian Advanced Digital Ionosondes (CADI) in the northern polar cap.
P. T. Jayachandran, P. T. Jayachandran, J. W. MacDougall   +2 more
doaj   +1 more source

Polar cap index comparisons with AMIE cross polar cap potential, electric field, and polar cap area [PDF]

Geophysical Research Letters, 2004
The polar cap index (PCI) has been shown to be quite useful as an index of the electrodynamic processes within the high‐latitude ionosphere. Here we use between 150 and 180 magnetometers to model the high‐latitude electrodynamics with the assimilative mapping of ionospheric electrodynamics (AMIE) technique for all of 1997–2001.
Ridley, Andrew, Kihn, E.A.
openaire   +3 more sources

Polar Cap Patch Prediction in the Expanding Contracting Polar Cap Paradigm [PDF]

Space Weather, 2019
AbstractSpace 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 describe the formation and propagation of polar cap patches and predict their arrival at the ...
A. Fæhn Follestad, L. B. N. Clausen, E. G. Thomas, Y. Jin, A. Coster   +4 more
openaire   +2 more sources

Variations in the polar cap area during intervals of substorm activity on 20-21 March 1990 deduced from AMIE convection patterns [PDF]

Annales Geophysicae, 1996
The dynamic behaviour of the northern polar cap area is studied employing Northern Hemisphere electric potential patterns derived by the Assimilative Mapping of Ionospheric Electrodynamics (AMIE) procedure. The rate of change in area of the polar cap,
J. R. Taylor, T. K. Yeoman, M. Lester, B. A. Emery, D. J. Knipp   +4 more
doaj   +1 more source

Spherical Caps in Cell Polarization [PDF]

Biophysical Journal, 2018
Intracellular symmetry breaking plays a key role in wide range of biological processes, both in single cells and in multicellular organisms. An important class of symmetry-breaking mechanisms relies on the cytoplasm/membrane redistribution of proteins that can autocatalytically promote their own recruitment to the plasma membrane.
Diegmiller, Rocky, Montanelli, Hadrien, Muratov, Cyrill B, Shvartsman, Stanislav Y   +3 more
openaire   +3 more sources

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

Polar caps during geomagnetic polarity reversals [PDF]

Geophysical Journal International, 2018
Fil: Zossi, Bruno Santiago. Universidad Nacional de Tucuman. Facultad de Ciencias Exactas y Tecnologia; Argentina. Universidad Nacional de Tucuman. Instituto de Fisica del Noroeste Argentino. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet Noa Sur.
Bruno Zossi, Mariano Fagre, Hagay Amit, Ana G Elias   +3 more
openaire   +3 more sources

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, L. B. N. Clausen, W. J. Miloch, J. van denIJssel, R. Haagmans   +4 more
doaj   +1 more source

IR SPECTRAL MAPPING OF THE MARTIAN SOUTH POLAR RESIDUAL CAP USING CRISM [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Polycyclic aromatic hydrocarbons (PAHs) are considered to be important in theories of abiogenesis (Allamandola, 2011) . There is evidence that PAHs have been detected on two icy Saturnian satellites using the Visual and Infrared Mapping Spectrometer ...
J. Campbell, J. Campbell, P. Sidiropoulos, J.-P. Muller   +3 more
doaj   +1 more source

Transpolar voltage and polar cap flux during the substorm cycle and steady convection events [PDF]

, 2009
Transpolar voltages observed during traversals of the polar cap by the Defense Meteorological Satellite Program (DMSP) F-13 spacecraft during 2001 are analyzed using the expanding-contracting polar cap model of ionospheric convection.
Ahn, Ahn, Alexis Rouillard, Boudouridis, Boyle, Bristow, Cai, Chisham, Cowley, Cowley, Cowley, Doyle, Eriksson, Fox, Freeman, Freeman, Freeman, Grocott, Hairston, Hairston, Hairston, Hairston, Hanson, Hapgood, Holzer, Hones, Hubert, Ivan Finch, Khan, Kihn, Kivelson, Lagarias, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lockwood, Lu, Lu, Lu, Marc Hairston, Mike Lockwood, Milan, Milan, Milan, Morley, Mozer, Murphree, Nagatsuma, Nakata, Nelder, Newell, Nishida, Papitashvili, Phan, Provan, Reiff, Reiff, Reiff, Ridley, Ridley, Ruohoniemi, Ruohoniemi, Russell, Shepherd, Siscoe, Siscoe, Siscoe, Sonnerup, Weimer, Weimer, Wygant, Zhang   +78 more
core   +1 more source