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Aeronomic effects of the South Atlantic Anomaly
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In this article, experimental and theoretical values for precipitated electron and proton fluxes in the area of the South Atlantic geomagnetic anomaly are reviewed, and it is shown that there is no enhancement in the Brazilian region, though there may be some in the southeastern part of the Atlantic area.Abstract:
Experimental and theoretical values for precipitated electron and proton fluxes in the area of the South Atlantic geomagnetic anomaly are reviewed. Observations of airglow which have been reported in the literature suggest that there is no enhancement in the Brazilian region, though there may be some in the southeastern part of the Atlantic area. There is evidence from various types of observations that the electron density in the ionosphere is greater over the South Atlantic than at comparable places elsewhere, especially during magnetic disturbances, and similarly the ion density shows enhanced values. Electron and neutral temperatures may also be higher than normal in the anomalous region. Observations are required in all these fields, coordinated with particle flux measurements from rockets and satellites in the area, to confirm the reality of the effects and their relationship to particle precipitation.read more
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International Geomagnetic Reference Field: the eleventh generation
Christopher C. Finlay,Stefan Maus,Ciaran Beggan,T. Bondar,Aude Chambodut,T. Chernova,Arnaud Chulliat,V. Golovkov,Brian Hamilton,Mohamed Hamoudi,Richard Holme,Gauthier Hulot,Weijia Kuang,Benoit Langlais,Vincent Lesur,F. J. Lowes,H. Lühr,Susan Macmillan,Mioara Mandea,S. Mclean,C. Manoj,Michel Menvielle,Ingo Michaelis,Nils Olsen,Jan Rauberg,Martin Rother,Terence J. Sabaka,Andrew Tangborn,Lars Tøffner-Clausen,Erwan Thébault,Alan Thomson,Ingo Wardinski,Zigang Wei,Tatiana I. Zvereva +33 more
Abstract: The eleventh generation of the International Geomagnetic Reference Field (IGRF) was adopted in December 2009 by the International Association of Geomagnetism and Aeronomy Working Group V-MOD. It updates the previous IGRF generation with a definitive main field model for epoch 2005.0, a main field model for epoch 2010.0, and a linear predictive secular variation model for 2010.0–2015.0. In this note the equations defining the IGRF model are provided along with the spherical harmonic coefficients for the eleventh generation. Maps of the magnetic declination, inclination and total intensity for epoch 2010.0 and their predicted rates of change for 2010.0–2015.0 are presented. The recent evolution of the South Atlantic Anomaly and magnetic pole positions are also examined.
Journal ArticleDOI
The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly
Christopher C. Finlay,Clemens Kloss,Nils Olsen,Magnus Danel Hammer,Lars Tøffner-Clausen,Alexander Grayver,Alexey Kuvshinov +6 more
TL;DR: The CHAOS-7 model as mentioned in this paper is based on magnetic field observations collected by the low-Earth orbit satellites Swarm, CryoSat-2, CHAMP, SAC-C and Orsted, and on annual differences of monthly means of ground observatory measurements.
Journal ArticleDOI
Features of annual and semiannual variations derived from the global ionospheric maps of total electron content
Biqiang Zhao,Weixing Wan,Libo Liu,Tian Mao,Zhuoxiang Ren,Mengmeng Wang,Andrew B. Christensen +6 more
TL;DR: In this paper, the authors used the NASA-JPL global ionospheric maps of total electron content (TEC) to construct TEC maps and used them to estimate the annual-to-mean amplitude ratio, A1, and the semiannual-to mean amplitude ratio A2, as well as the latitudinal symmetrical and asymmetrical parts, A' and A" of A1.
Journal ArticleDOI
Global zones of energetic particle precipitation
H.D. Voss,L.G. Smith +1 more
TL;DR: In this article, the authors identify global zones of energetic particle precipitation in the nighttime atmosphere during disturbed magnetic conditions in rocket, satellite, and ground-based measurements and identify distinct low and mid-latitude zones; poleward from the plasmapause the precipitation flux is nearly isotropic and variable, and it consists of electrons and ions with the maximum intensity of the proton auroral zone occurring about 5 deg equatorward of the maximum of the electron auroral zones.
Journal ArticleDOI
Electron energy deposition in the middle atmosphere
A. L. Vampola,D. J. Gorney +1 more
TL;DR: In this article, the S3-2 satellite was used to calculate energy deposition profiles as a function of latitude, longitude, and altitude for the South Atlantic Anomaly region.
References
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Journal ArticleDOI
Coordinates for Mapping the Distribution of Magnetically Trapped Particles
TL;DR: In this article, it is shown that a parameter L = f(B,I) can be defined which retains most of the desirable properties of I and has the additional property of organizing measurements along lines of force.
Journal ArticleDOI
Auroral ionization and excitation by incident energetic electrons
TL;DR: In this paper, the luminosity profiles for the N 2 + 1 N.G. (0, 0) band are predicted for various energy distributions of auroral electrons in the energy range 0.4 to 300 keV.
Journal ArticleDOI
Equilibrium structure of radiation belt electrons
Larry R. Lyons,Richard M. Thorne +1 more
TL;DR: In this article, the detailed quiet time structure of energetic electrons in the earth's radiation belts is explained on the basis of a balance between pitch angle scattering loss and inward radial diffusion from an average outer zone source.
Journal ArticleDOI
Geomagnetic and solar data
TL;DR: In this paper, the authors present a series of reports which has appeared regularly in this Journal since vol. 54, no. 3, 295, 1949, with an explanation of the data given, and to vol. 59, no., 3, 423, 1954, for the definition of Ap.
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Energy deposition by auroral electrons in the atmosphere
TL;DR: In this article, the spatial distribution of energy deposited by auroral electrons in upper atmosphere, using Monte Carlo method, was analyzed using a Monte Carlo approach. And the results showed that