Calculation of Synthetic Ground Magnetograms From Current Distributions Calculated by Large-Scale Magnetosphere-Ionosphere Coupling Codes

Details Calculation of Synthetic Ground Magnetograms From Current Distributions Calculated by Large-Scale Magnetosphere-Ionosphere Coupling Codes Calculation of Synthetic Ground Magnetograms From Current Distributions Calculated by Large-Scale Magnetosphere-Ionosphere Coupling Codes

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm33b1344o&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM33B-1344

Physics

2700 Magnetospheric Physics (6939), 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 7954 Magnetic Storms (2788), 7959 Models

Scientific paper

Global MHD models, ring-current models, and convection models calculate the large-scale currents in the magnetosphere-ionosphere system. Traditionally, these models have been tested against single-point magnetic field measurements made by individual spacecraft, which often do not provide a clear picture of the pattern of model-data discrepancies. The global network of ground-based magnetometers constitutes a large source of data that is currently being underutilized for validation and analysis of these models. This is primarily due to the lack of a good code that accurately makes the connection between the model outputs and ground magnetometer data. We have developed a numerical algorithm to compute realistic ground magnetic field perturbations from these models. A generalized version of the software can be used with a wide variety of large-scale magnetosphere-ionosphere models. We show initial calculation results of Dst and UT-LT contour maps of low latitude magnetic perturbations for simulation results from one or more large-scale models.

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