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# Magnetopause shear angle 

## Licence

This is a python implementation of the magnetopause shear angle representation from Trattner et al. (2007). 

References
Cooling, B. M. A., C. J. Owen andS. J. Schwartz (2001), Role of the magnetosheath flow in determining the motion of open flux tubes, J. Geophys. Res., 106,  A9, doi.org/10.1029/2000JA000455.
Jelínek, K., Z. Němeček and J. Šafránková (2012), A new approach to magnetopause and bow shock modeling based on automated region identification, J. Geophys. Res., 117, A5, doi.org/10.1029/2011JA017252
Kobel, E. and  E. O. Flückiger, A model of the steady state magnetic field in the magnetosheath, J. Geophys. Res., 99, A12, doi.org/10.1029/94JA01778
Sibeck, D. G.,   R. E. Lopez and E. C. Roelof (1991), Solar wind control of the magnetopause shape, location, and motion, J. Geophys. Res., 96, A4, doi.org/10.1029/90JA02464.
Trattner, K. J., J. S. Mulcock, S. M. Petrinec, and S. A. Fuselier (2007), Probing the boundary between antiparallel and component reconnection during southward interplanetary magnetic field conditions, J. Geophys. Res., 112, A08210, doi:10.1029/2007JA012270.
Tsyganenko, N. A. (1995), Modeling the Earth's magnetospheric magnetic field confined within a realistic magnetopause, J. Geophys. Res., 100, A4, doi.org/10.1029/94JA03193

The geomagnetic field model at the magnetopause boundary is T96 (Tsyganenko, 1995). The T96 fortran code is available at http://geo.phys.spbu.ru/~tsyganenko/modeling.html
The geopack module including IGRF is available at http://geo.phys.spbu.ru/~tsyganenko/modeling.html


## Installation
Linux
=====
    sudo python setup.py install

Windows 10
==========
Prerequisites
--------------
Install mingw-64 (e.g. to c:\mingw) with:
    Architecture	Threads	Exception
    x86_64	posix	seh

Install miniconda
Miniconda3 Windows 64-bit 

in anaconda cmd window (from Windows Start->Anaconda3 (64-bit)->Anaconda Prompt (Miniconda3))
   conda install numpy
   conda install matplotlib
   conda install scipy

Install mingw-64 toolchain for f2py
in anaconda cmd window (Anaconda Prompt (Miniconda3)) type:      
     conda install libpython
     conda install -c msys2 m2w64-toolchain
	 
Module installation
-------------------
in anaconda cmd window type 
python setup.py install	 
	 
## Use

To use this module :

python mp_shear_angle.py
or
python3 mp_shear_angle.py