Journal ArticleDOI
Mapping electrodynamic features of the high-latitude ionosphere from localized observations: technique
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In this article, the authors describe a procedure for mapping high-latitude electric fields and currents and their associated magnetic variations, using sets of localized observational data derived from different types of measurements.Abstract:
This paper describes a novel procedure for mapping high-latitude electric fields and currents and their associated magnetic variations, using sets of localized observational data derived from different types of measurements. The technique provides a formalism for incorporating simultaneously such different classes of data as electric fields from radars and satellites, electric currents from radars, and magnetic perturbations at the ground and at satellite heights; the technique also uses available statistical information on the averages and variances of electrodynamic fields. The technique provides a more rigorous way of quantitatively estimating high-latitude electric field and current patterns than other methods and has a capability to quantify the errors in the mapped fields, based on the distribution of available data, their errors, and the statistical variances of the fields. The technique is illustrated by an application to a substorm which was analyzed by Kamide et al. (1982) by an earlier technique.read more
Citations
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Journal ArticleDOI
DARN/SUPERDARN : A global view of the dynamics of high-latitude convection
R. A. Greenwald,K. B. Baker,J. R. Dudeney,Michael Pinnock,T. B. Jones,E. C. Thomas,Jean-Paul Villain,Jean-Claude Cerisier,C. Senior,C. Hanuise,R. D. Hunsucker,George J. Sofko,James A. Koehler,Erling Nielsen,R. J. Pellinen,Anthony Walker,N. Saot,H. Yamagishi +17 more
TL;DR: The Dual Auroral Radar Network (DARN) is a global-scale network of HF and VHF radars capable of sensing backscatter from ionospheric irregularities in the E and F-regions of the high-latitude ionosphere as mentioned in this paper.
Journal ArticleDOI
Space Weather Modeling Framework: A new tool for the space science community
Gabor Toth,Igor V. Sokolov,Tamas I. Gombosi,David Chesney,C. Robert Clauer,D. L. De Zeeuw,Kenneth C. Hansen,K. Kane,Ward B. Manchester,R. C. Oehmke,Kenneth G. Powell,Aaron J. Ridley,Ilia I. Roussev,Quentin F. Stout,O. Volberg,Richard A. Wolf,Stanislav Sazykin,Anthony A. Chan,Bin Yu,József Kóta +19 more
TL;DR: The Space Weather Modeling Framework (SWMF) as discussed by the authors provides a high-performance flexible framework for physics-based space weather simulations, as well as for various space physics applications.
Journal ArticleDOI
A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions
Gareth Chisham,Mark Lester,Steve Milan,Mervyn P. Freeman,William A. Bristow,Adrian Grocott,Kathryn A. McWilliams,J. M. Ruohoniemi,Tim K. Yeoman,Peter. Dyson,R. A. Greenwald,Takashi Kikuchi,Michael Pinnock,J.P.S. Rash,Noriaki K. Sato,George J. Sofko,Jean-Paul Villain,Anthony Walker +17 more
TL;DR: The Super Dual Auroral Radar Network (SuperDARN) as discussed by the authors has been operating as an international co-operative organization for over 10 years and has been successful in addressing a wide range of scientific questions concerning processes in the magnetosphere, ionosphere, thermosphere, and mesosphere, as well as general plasma physics questions.
Journal ArticleDOI
Large-scale imaging of high-latitude convection with Super Dual Auroral Radar Network HF radar observations
J. M. Ruohoniemi,K. B. Baker +1 more
TL;DR: In this paper, a method of deriving large-scale convection maps based on all the available velocity data is described, which is used to determine a solution for the distribution of electrostatic potential, expressed as a series expansion in spherical harmonics.
Journal ArticleDOI
The SuperMAG data processing technique
Jesper Gjerloev,Jesper Gjerloev +1 more
TL;DR: There is no correct baseline determination technique since there does not have a set of ground-truth observations required to make an objective evaluation, so the user must keep in mind the assumptions on which the baseline was determined and draw conclusions accordingly.
References
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Journal ArticleDOI
Empirical high-latitude electric field models
J. P. Heppner,N. C. Maynard +1 more
TL;DR: In this paper, large-scale revisions of the OGO 6 dawn-dusk measurement models are made, showing that the deformations of the two-cell patterns lead to sunward convection in dayside polar regions, while maintaining the integrity of the night-side convection pattern.
Journal ArticleDOI
Large‐scale characteristics of field‐aligned currents associated with substorms
T. Iijima,T. A. Potemra +1 more
TL;DR: In this paper, the authors determined the statistical features of field-aligned currents during a large number of substorms from the magnetic field observations acquired with the Triad satellite, including the following: (1) the large-scale regions of fieldaligned currents determined previously by the authors (Iijima and Potemra, 1976a) persist during all phases of sub-storm activity, namely, region 1, located near the poleward boundary of the fieldaligned current region, and region 2, positioned near the equatorward boundary.
Journal ArticleDOI
On calculating ionospheric conductances from the flux and energy of precipitating electrons
TL;DR: Auroral zone conductances can be estimated from the energy flux and average energy of precipitating electrons Revised expressions are presented that relate height-integrated Hall and Pedersen conductance to the flux and energy of a Maxwellian as mentioned in this paper.
Journal ArticleDOI
Dependence of polar cap potential drop on interplanetary parameters
TL;DR: In this article, the convection potential drop across the polar cap is computed from data obtained on high-inclination low-altitude satellites and the potential measurements are correlated with various combinations of parameters measured simultaneously in the upstream solar wind.
Journal ArticleDOI
Empirical models of high latitude electric fields
TL;DR: In this article, a model of the high latitude dawn-dusk electric field based on OGO-6 data is presented for the signature profiles, most frequently encountered for both + and -Y orientations of the interplanetary magnetic field.
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