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This code contains the particle tracing code used for Huybrighs et al., 2025
as well as the scripts to make the plots in the figures.

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Developed by Hans L.F. Huybrighs 

with contributions from:
- Christiaan P.A. Van Buchem (ion_btracing.py)
- Oliver Lomax (fast interpolation of 3D grids using Fortran,
see toolbox/interpolate)

The code uses the following pyanaUtil modules: ptracing and vector3d.
pyanaUtil is developed by Prof. Yoshifumi Futaana at the Swedish Institute
for Space Physics (IRF, Kiruna). 
For access to pyanaUtil please contact [email protected]

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Copyright (C) 2025 Hans Huybrighs

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.