Model of auroral and airglow emissions

## Project description

NOTE: | New Modern Fortran GLOW is being built-up at https://github.com/scivision/GLOW with Python, Matlab, or MPI. |
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## glow-aurora

Stan Solomon’s GLOW Auroral model – now in Python!

Fortran author: | Stan Solomon |
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Python API author: | |

Michael Hirsch |

Contents

### Prereq

If you don’t already have Numpy:

pip install numpy

- Linux / BSD /
Windows Subsystem for Linux:
`apt install gfortran` - Mac:
`brew install gcc`

### Install

pip install -e .

### Examples

#### Self-test f2py

This self-test should give zero errors. This tests the Fortran code from Python.:

pytest -v

#### volume emission rate plots

To produce the plots seen at the Github site:

python RunGlow.py

with options including:

-t, --simtime |
time of simulation (ending in Z for UTC) |

-c, --latlon |
geographic coordinate (lat,lon) [degrees] |

-q, --flux |
total flux |

with the volume emission rate and intermediate processes modeled for the given primary electron precipitation input. You can make this more generally useful as eigenprofiles in the next section.

#### production/loss rate eigenprofiles

This requires two steps:

- Generate unit input differential number flux vs. energy
- Compute ionospheric energy deposition and hence production/loss rates for the modeled kinetic chemistries (12 in total)

This is handled by the script `gridaurora/MakeIonoEigenprofile.py`

#### Matlab access to Glow

Matlab can use Glow via the Python interface, as in the example `glow.m`.

### Papers

(Thanks to Stephen Kaeppler to pointing these out)

http://download.hao.ucar.edu/pub/stans/papers/BaileyJGR2002.pdf

http://download.hao.ucar.edu/pub/stans/papers/SolomonJGR1988.pdf

### Appendix (Not necessary for the typical user)

#### Download the GLOW v0.973 source code from Stan Solomon

Stan’s team has released GLOW v0.98 using modern Fortran, but here’s the original.

wget -r -np -nc -nH --cut-dirs=4 --random-wait --wait 1 -R "index.html*" http://download.hao.ucar.edu/pub/stans/glow/v0.973/

#### Download Stan’s copy of IRI files

Stan tweaked IRI90 slightly, here’s the copy he uses.

wget -r -np -nc -nH --cut-dirs=3 --random-wait --wait 1 -R "index.html*" http://download.hao.ucar.edu/pub/stans/iri/

#### compile the Fortran code by itself

The Fortran program used by itself spits out a lot of text as its output:

cd bin cmake ../fortran make

#### Fortran self-test

Auroral example

./auroraexample < aurexample.in > aurtest.dat

High energy example

./hexexample < hexexample.in > hextest.dat

### Licensing

original Fortran code in directory `fortran/` as obtained from http://download.hao.ucar.edu/pub/stans/glow/:
“This software is part of the GLOW model.
Use is governed by the Open Source Academic Research License Agreement contained in the file glowlicense.txt.”

Python code and modifications to original Fortran code: GNU Affero GPLv3+

## Project details

## Download files

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Filename, size & hash SHA256 hash help | File type | Python version | Upload date |
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glowaurora-1.2.0.tar.gz (474.5 kB) Copy SHA256 hash SHA256 | Source | None | Mar 9, 2018 |