lowtran
LOWTRAN atmospheric absorption extinction, scatter and irradiance model--in Python and Matlab
Science Score: 49.0%
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LOWTRAN atmospheric absorption extinction, scatter and irradiance model--in Python and Matlab
Basic Info
Statistics
- Stars: 110
- Watchers: 10
- Forks: 43
- Open Issues: 6
- Releases: 10
Topics
Metadata Files
README.md
Lowtran in Python
LOWTRAN7 atmospheric absorption extinction model. Updated to be platform independent and easily accessible from Python and Matlab.
The main LOWTRAN program is accessible from Python by using direct memory transfers instead of the cumbersome and error-prone process of writing/reading text files.
xarray.Dataset high-performance, simple N-D array data is passed out, with appropriate metadata.
Gallery
See below for how to make these examples.
Install
Lowtran requires a Fortran compiler and CMake.
We use f2py (part of numpy) to seamlessly use Fortran libraries from Python by special compilation of the Fortran library with auto-generated shim code.
For Python 3.12, make sure to install setuptools using pip, i.e., pip install setuptools and make sure meson is available on the system.
If a Fortran compiler is not already installed, install Gfortran:
- Linux:
apt install gfortran - Mac:
brew install gcc - Windows: Windows Subsystem for Linux
Install Python Lowtran code
sh
pip install -e .
Examples
In these examples, optionally write to HDF5 with the -o option.
We present Python examples of:
- ground-to-space transmittance: TransmittanceGround2Space.py
* sun-to-observer scattered radiance (why the sky is blue): ScatterRadiance.py
* sun-to-observer irradiance: SolarIrradiance.py
* observer-to-observer solar single-scattering solar radiance (up-going) with custom Pressure, Temperature and partial pressure for 12 species: UserDataHorizontalRadiance.py
* observer-to-observer transmittance with custom Pressure, Temperature and partial pressure for 12 species: UserDataHorizontalTransmittance.py
* observer-to-observer transmittance: HorizontalTransmittance.py
Matlab
Matlab users can seamlessly access Python modules, as demonstrated in RunLowtran.m.
Here's what's you'll need:
- Setup Python ↔ Matlab interface.
- Install Lowtran in Python as at the top of this Readme.
- From Matlab, verify everything is working by:
matlab
runtests('lowtran')
Notes
LOWTRAN7 User manual Refer to this to understand what parameters are set to default. Currently I don't have any aerosols enabled for example, though it's possible to add them into the code.
Right now a lot of configuration features aren't implemented, please request those you want.
Reference
- Original 1994 Lowtran7 Code
LOWFILprogram in reference/lowtran7.10.f was not connected as we had previously implemented a filter function directly in Python.LOWSCANspectral sampling (scanning) program inreference/lowtran7.13.fwas not connected as we had no need for coarser spectral resolution.
Owner
- Name: Space Physics
- Login: space-physics
- Kind: organization
- Location: 1 au
- Repositories: 63
- Profile: https://github.com/space-physics
Space Physics modeling and analysis
GitHub Events
Total
- Issues event: 2
- Watch event: 10
- Fork event: 1
Last Year
- Issues event: 2
- Watch event: 10
- Fork event: 1
Committers
Last synced: 6 months ago
Top Committers
| Name | Commits | |
|---|---|---|
| scivision | s****n@u****m | 372 |
| scivision | s****n@n****m | 4 |
| Michael Hirsch, Ph.D | 1****n@u****m | 3 |
| Jonas Krimmer | 3****r@u****m | 1 |
Committer Domains (Top 20 + Academic)
Issues and Pull Requests
Last synced: 6 months ago
All Time
- Total issues: 25
- Total pull requests: 2
- Average time to close issues: over 1 year
- Average time to close pull requests: 5 days
- Total issue authors: 20
- Total pull request authors: 2
- Average comments per issue: 1.16
- Average comments per pull request: 0.0
- Merged pull requests: 1
- Bot issues: 0
- Bot pull requests: 0
Past Year
- Issues: 1
- Pull requests: 0
- Average time to close issues: 40 minutes
- Average time to close pull requests: N/A
- Issue authors: 1
- Pull request authors: 0
- Average comments per issue: 0.0
- Average comments per pull request: 0
- Merged pull requests: 0
- Bot issues: 0
- Bot pull requests: 0
Top Authors
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- aeropung (3)
- OctagonHex (3)
- aschneid42 (2)
- chrismolli (1)
- SmithPeng (1)
- drhirsch (1)
- Caxec (1)
- bpdavis86 (1)
- justapythonuser (1)
- brian-rose (1)
- jimparker96313 (1)
- shoste120 (1)
- SanaShaukat (1)
- thirtyUp (1)
- jimustafa (1)
Pull Request Authors
- WhiteChimney (1)
- jkrimmer (1)
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Packages
- Total packages: 1
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Total downloads:
- pypi 425 last-month
- Total dependent packages: 0
- Total dependent repositories: 1
- Total versions: 19
- Total maintainers: 1
pypi.org: lowtran
Model of Earth atmosphere absorption and transmission vs. wavelength and location.
- Documentation: https://lowtran.readthedocs.io/
- License: mit
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Latest release: 3.1.0
published about 3 years ago
Rankings
Maintainers (1)
Dependencies
- actions/checkout v3 composite
- actions/setup-python v4 composite
- msys2/setup-msys2 v2 composite
- numpy *
- python-dateutil *
- xarray *