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Tom Daggitt, S. A. Glauert, Aaron T. Hendry, M. P. Freeman et autres
Three dimensional radiation belt models like the BAS radiation belt model and the VERB code assume that trapped electrons within the model space remain at a fixed kinetic energy in the absence of wave-particle interactions. However, it is also accepted that at …
gb (code pays fourni par la source)
Ciarán Beggan, J. P. Eastwood, Joseph Eggington, C. Forsyth et autres
Abstract The enhanced variation of the magnetic field during severe to extreme geomagnetic storms induces a large geoelectric field in the subsurface. Grounded infrastructure can be susceptible to geomagnetically induced currents (GICs) during these events. Modeling the effect in real‐time and forecasting …
gb (code pays fourni par la source)
Christian J. Lao, C. Forsyth, M. P. Freeman, J. W. Gjerloev
Abstract Substorms have been identified from negative bays in the AL/SML index, which traces the minimum northward ground magnetic deflection at auroral latitudes, produced by enhancements of the westward electrojet. For substorms, negative bays are caused by the closure of the Substorm …
gb, us (code pays fourni par la source)
Using line-of-sight velocity measurements made by SuperDARN (The Super Dual Auroral Radar Network) radars with overlapping fields of view, it is possible to estimate the vorticity of the ionospheric convection flow over a wide range of scales. Here we exploit previous statistical …
gb (code pays fourni par la source)
Christian J. Lao, C. Forsyth, M. P. Freeman, J. W. Gjerloev
Substorms have been identified from negative bays in the AL/SML index, which traces the minimum northward ground magnetic deflection at auroral latitudes, produced by enhancements of the westward electrojet. For substorms, negative bays are caused by the closure of the Substorm Current …
gb (code pays fourni par la source)
Christian J. Lao, C. Forsyth, M. P. Freeman, J. W. Gjerloev
Substorms can be identified from negative bays in the AL/SML index, which traces the minimum northward ground magnetic deflection at auroral latitudes, produced by enhancements of the westward electrojet. For substorms, negative bays are caused by the closure of the Substorm Current …
gb (code pays fourni par la source)
Christian J. Lao, C. Forsyth, M. P. Freeman, Andrew W. Smith et autres
Abstract Substorms are a rapid release of energy that is redistributed throughout the magnetosphere‐ionosphere system, resulting in many observable signals, such as enhancements in the aurora, energetic particle injections, and ground magnetic field perturbations. Numerous substorm identification techniques and onset lists based …
gb (code pays fourni par la source)
William E. Parker, M. P. Freeman, G. Chisham, Andrew John Kavanagh et autres
Abstract A significant increase in the number of anthropogenic objects in Earth orbit has necessitated the development of satellite conjunction assessment and collision avoidance capabilities for new spacecraft. Neutral mass density variability in the thermosphere, driven by enhanced geomagnetic activity and solar …
us, gb, es (code pays fourni par la source)
Abstract The ability to understand and model ionospheric plasma flow on all spatial scales has important implications for operational space weather models. This study exploits a recently developed method to statistically separate large‐scale and meso‐scale contributions to probability density functions (PDFs) of …
gb (code pays fourni par la source)
Shane Coyle, J. B. H. Baker, Shibaji Chakraborty, Michael D. Hartinger et autres
Abstract Solar eclipses present a rare glimpse into the impact of ionospheric electrodynamics on the magnetosphere independent of other well studied seasonal influences. Despite decades of study, we still do not have a complete description of the conditions for geomagnetic substorm onset. …
us, gb (code pays fourni par la source)
William E. Parker, M. P. Freeman, G. Chisham, Andrew John Kavanagh et autres
A significant increase in the number of anthropogenic objects in Earth orbit has necessitated the development of satellite conjunction assessment and collision avoidance capabilities for new spacecraft. Often, the greatest source of uncertainty in predicting a satellite's trajectory in low Earth orbit …
us, gb, es (code pays fourni par la source)
John Coxon, G. Chisham, M. P. Freeman, C. Forsyth et autres
Abstract We examine the statistical distribution of large‐scale Birkeland currents measured by the Active Magnetosphere and Planetary Electrodynamics Response Experiment in four unique categories of geomagnetic activity for the first time: quiet times, storm times, quiet‐time substorms, and storm‐time substorms. A novel …
gb, us, ie (code pays fourni par la source)
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