KTH22

KTH22-model Model of Mercury's Magnetospheric Magnetic Field (KTH22) This model calculates the magnetic field inside the Hermean magnetosphere. Publication: "Revised Magnetospheric Model Reveals Signatures of Field-Aligned Current Systems at Mercury" (under review, August 2023) Description: Calculates the magnetospheric field for Mercury. Based on Korth et al., (2015) with improvements. Model is intended for planning purposes of the BepiColombo mission. If you plan to make a publication with the aid of this model, the opportunity to participate as co-author would be appreciated. If you have suggestions for improvements, do not hesitate to write me an email. Takes into account: - internal dipole field (offset dipole) - field from neutral sheet current - respective shielding fields from magnetopause currents - aberration effect due to orbital motion of Mercury - scaling with heliocentric distance - scaling with Disturbance Indec (DI) Required python packages: numpy, scipy Input Parameters: x_mso: in, required, X-positions (array) in MSO base given in km y_mso: in, required, Y-positions (array) in MSO base given in km z_mso: in, required, z-positions (array) in MSO base given in km r_hel: in, required, heliocentric distance in AU, use values between 0.3 and 0.47 DI: in, required, disturbance index (0 < DI < 100), if not known: 50 (mean value) modules: dipole (internal and external), neutralsheet (internal and external), ring current (internal) "external = True" calculates the cf-fields (shielding fields) for each module which is set true Return: Bx, By, Bz in nT for each coordinate given (x_mso, y_mso, z_mso) (if outside of calculated magnetosphere or inside Mercury, the KTH-model will return 'nan') Authors: Daniel Heyner, Institute for Geophysics and extraterrestrial Physics, Braunschweig, Germany, d.heyner@tu-bs.de Kristin Pump, Institute for Geophysics and extraterrestrial Physics, Braunschweig, Germany, k.pump@tu-bs.d