HR: 0800h
AN: SM41A-0330    [Abstracts]
TI: Evaluation of Solar-Wind Magnetosphere Coupling Functions Using the WINDMI Model
AU: * Spencer, E A
EM: espencer@engineering.usu.edu
AF: Center for Space Engineering, Utah State University, 4170 Old Main Hill, Logan, UT 84322, United States
AU: Kaveri, S
EM: srinidhi_1999@yahoo.com
AF: Center for Space Engineering, Utah State University, 4170 Old Main Hill, Logan, UT 84322, United States
AU: Horton, W
EM: horton@physics.utexas.edu
AF: Institute for Fusion Studies, University of Texas at Austin, 1 College Station C1500, Austin, TX 78712, United States
AU: Mays, L
EM: lmays@physics.utexas.edu
AF: Institute for Fusion Studies, University of Texas at Austin, 1 College Station C1500, Austin, TX 78712, United States
AB: Solar-wind Magnetosphere coupling functions from Newell et. al. 2007 are used as inputs into the WINDMI physics based nonlinear dynamical model of the Earth's nightside magnetosphere. The coupling functions are scaled to the rectified vB_s coupling function of Burton et. al. 1975 for this purpose. The outputs of the model are the AL and Dst indices that are compared to the indices measured on the ground. The physical parameters of the model are optimized using a genetic algorithm (GA) computation scheme for each different input using the October 3-7 2000 and April 15-24 2002 Geomagnetic Storm Datasets. The optimization of the model parameters is performed over 3-6 hour intervals to incorporate the changing physical state of the nightside magnetosphere. The predictive capability of each input and the AL and Dst index are compared through using the average relative variance (ARV) and the cross-correlation (COR) measures. The coupling functions are ranked according to performance against the ARV and COR measures. The physical parameters of the WINDMI model obtained from the optimization is also presented. The best performing coupling function will be used as part of a hybrid physics black-box space weather prediction tool in future.
DE: 2722 Forecasting (7924, 7964)
DE: 2788 Magnetic storms and substorms (7954)
DE: 7924 Forecasting (2722)
DE: 7954 Magnetic storms (2788)
DE: 7959 Models
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting