Coordinates for Magnetospheric Studies at Jupiter
Note that the radius of Jupiter used in all coordinates is 71,492 km
Dipole approximation >5RJ from Jupiter: Tilted θd = 9.5° toward SysIII Wlong φd =201°.
Centrifugal Equator: <9 RJ ok to use 2/3 of dipole tilt, for >9 RJ the centrifugal equator moves toward the magnetic equator. For analytic approximation based on JRM09+CON2020 see Phipps & Bagenal 2021
JRM09 Dipole approximation – for close to Jupiter : moment M=4.170 G offset from rotation axis by θd =10.31o toward SysIII Wlong φd =196.61o.
From Masafumi Imai (23 Feb 2019) – using JRM09+CAN – mapping from dipole magnetic equator to poles. Note this is not orthographic projection – but latitude and longitude maps. Zipped folder with figures, text file of (lat,lon) for M-shells and IDL procedure for reading: M-Shells South_M-shell_ovals +Mag South_M-shell ovals North_M-shell oval +Mag North_M-shell ovals
Magnetic Field Mapping and Labelling – Discussion at 7 Oct 2016 MWG telecon.
Jupiter Coordinates – Version 12 – 20th Oct 2016 – this now has the JPL SPICE references for each of the 6 coordinate systems. It is identical to version 11 except refers to the official SPICE frame kernel and tidied some figures.
Plot of Precession (from Boris Semenov, JPL) this is the wobble of Jupiter’s spin axis over decades (1970-2030). And some relevant code & numbers. Probably not relevant for most MWG studies that rarely worry about micro radians.
This discussion evolved from (considerably adapted) the appendix of the MWG article in Space Science Reviews “Magnetospheric Science Objectives of the Juno Mission”, Bagenal et al. (2014), DOI: 10.1007/s11214-014-0036-8
