New-generation empirical magnetic field models: Increasing resolution of equatorial and Birkeland currents and transition from modeling to nowcasting

Grant Killian Stephens, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, Mikhail I. Sitnov, Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States and Robert J Redmon, NOAA National Centers for Environmental Information, Boulder, United States