Gridding for auroral and ionospheric modeling
Grid for Auroral models
Discretizations of space (grids) and time conversions useful for aeronomy and auroral modeling.
python -m pip install -e .
Note: you will need a Fortran compiler on your system for
It works on Linux, Mac, Windows, etc.
Currently GLOW and Rees-Sergienko-Ivanov are available (Transcar in future). You can install these models with
pip install -e .[models]
Once installed, select model by:
-M glowStan Solomon's GLOW model
Command Line Options
-t time, format yyyy-mm-ddTHH:MM:SSZ where Z sets UTC time zone -c lat, lon WGS84 geodetic degrees -o output, hDF5 ends in .h5 -M model select (see table above) -z min,max altitude to plot [km]
python MakeIonoEigenprofile.py -t 2013-01-31T09:00:00Z -c 65 -148 -o out.h5 -M rees
Auroral Data Files
The functions in
gridaurora/calcemissions.py, based on work by
Zettergren, computes per-wavelength volume emission rate along a flux
tube as a function of altitude along the tube. Starting with quantities
such as neutral densities computed by MSIS, differential number flux as
a function of energy and altitude along the tube (this is what TRANSCAR
computes), excitation cross sections as a function of energy,
Franck-Condon factors and Einstein coefficients, the prompt volume
emission rate may be computed.
This file is compiled from tables in Vallance Jones Aurora 1974 and other sources by Matthew Zettergren, and corrected and put into HDF5 format by Michael Hirsch. The information within concerns:
- N2+1NG: N
2^+^ first negative group
- N2_1PG: N
2first positive group
- N2_2PG: N
2second positive group
- N2+Meinel: N
2^+^ Meinel band
- atomic: atomic oxygen
- metastable: metastable O and O^+^
Einstein coefficient matrix A
arranged A(𝜈',𝜈'') where:
- 𝜈' upper state vibrational levels, excited from ground state 𝜈''' by particle impact
- 𝜈'' lower state vibrational levels, decayed into from the upper state
as discussed in Appendix C of Zettergren PhD thesis, Eqn. (C.2), photon
volume emission rate follows the relation P
𝜈',𝜈'' = A(𝜈',𝜈'')
wavelength in nanometers corresponding to the Einstein coefficient
atomic that uses the reaction rates directly.
Franck-Condon factor fc
as described in Zettergren thesis Appendix C, specifically for Eqn (C.6-C.8), the Franck-Condon factors modify the total upper state excitation cross section multiplicitively.
|ztanh.py||continuously varying grid using hyperbolic tangent. Inspired by suggestion from Prof. Matt Zettergren of ERAU.|
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