smrt
Snow Microwave Radiative Transfer model to compute thermal emission and backscatter from snowpack.
https://github.com/smrt-model/smrt
Category: Cryosphere
Sub Category: Snow and Permafrost
Keywords
microwave modeling snow
Keywords from Contributors
optimize archiving measur transforms generic compose observation conversion projection animals
Last synced: about 20 hours ago
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Repository metadata
Snow Microwave Radiative Transfer model to compute thermal emission, backscatter and altimetric waveform from snowpack, sea-ice, frozen lakes and other cryospheric environments
- Host: GitHub
- URL: https://github.com/smrt-model/smrt
- Owner: smrt-model
- License: other
- Created: 2016-10-31T16:42:14.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2025-12-18T15:51:47.000Z (6 days ago)
- Last Synced: 2025-12-21T19:59:31.636Z (3 days ago)
- Topics: microwave, modeling, snow
- Language: Python
- Homepage: https://smrt-model.science/
- Size: 1.85 MB
- Stars: 63
- Watchers: 18
- Forks: 27
- Open Issues: 11
- Releases: 12
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
README.md
Snow Microwave Radiative Transfer model
SMRT is a radiative transfer model to compute emission and backscatter from snowpack.
Getting started is easy, follow the instructions and explore the other repositories
with examples in the 'smrt-model' github organization or read the detailed 'documentation'.
If you want to try without installing anything on your computer, use free mybinder.org notenooks: .
If you want to try SMRT without coding, use SMRT-App.
You can also explore the documentation and find code examples via the AI Wiki. Please let us know your experience of using this via discussions.
Quick Installation
To install the latest stable release:
pip install smrt
Alternatively, the latest developments are available using:
pip install git+https://github.com/smrt-model/smrt.git
or by 'manual installation'.
A simple example
An example to calculate the brightness temperature from a one-layer snowpack.
from smrt import make_snowpack, sensor_list, make_model
# create a snowpack
snowpack = make_snowpack(thickness=[10.], # snowpack depth in m
microstructure_model="sticky_hard_spheres",
density=320.0, # density in kg/m3
temperature=260, # temperature in Kelvin
radius=100e-6) # scatterers raidus in m
# create the sensor (AMSRE, channel 37 GHz vertical polarization)
radiometer = sensor_list.amsre('37V')
# create the model including the scattering model (IBA) and the radiative transfer solver (DORT)
m = make_model("iba", "dort")
# run the model
result = m.run(radiometer, snowpack)
print(result.TbV())
License information
See the file LICENSE.txt for terms & conditions for usage, and a DISCLAIMER OF ALL
WARRANTIES.
DISCLAIMER: This version of SMRT is under peer review. Please use this software with caution, ask for assistance if needed, and let us know any feedback you may have.
Copyright (c) 2016-2025 Ghislain Picard, Melody Sandells, Henning Löwe.
Other contributions
- Nina Maass: initial implementation of the sea-ice functions
- Ludovic Brucker: initial implementation of the saline snow functions
- Mai Winstrup: initial implementation of the sea-ice functions
- Marion Leduc-Leballeur: test&debuging (snow and ice)
- Carlo Marin: debuging of the wet permittivities.
- Fanny Larue: debuging (LRM altimetry)
- Justin Murfitt: debuging (lake-ice, LRM altimetry)
- Julien Meloche: debuging (snow). Help to user. Iterative solver.
- Janna Rücker: implementation of new sea-ice functions
- Jacqueline Boutin: implementation of new sea-ice permittivity functions
- Hippolyte Signargout: code cleaning and modernization, documentation refactoring
- Ange Haddjeri: implementation of bedrock permittivity
Owner metadata
- Name: smrt-model
- Login: smrt-model
- Email:
- Kind: organization
- Description:
- Website:
- Location:
- Twitter:
- Company:
- Icon url: https://avatars.githubusercontent.com/u/23165787?v=4
- Repositories: 9
- Last ynced at: 2023-08-07T09:31:44.822Z
- Profile URL: https://github.com/smrt-model
GitHub Events
Total
- Create event: 16
- Release event: 3
- Issues event: 4
- Watch event: 10
- Delete event: 17
- Member event: 1
- Issue comment event: 26
- Push event: 132
- Pull request review event: 14
- Pull request review comment event: 24
- Pull request event: 38
- Fork event: 6
Last Year
- Create event: 16
- Issues event: 3
- Release event: 3
- Watch event: 7
- Delete event: 17
- Member event: 1
- Issue comment event: 20
- Push event: 130
- Pull request review event: 14
- Pull request review comment event: 24
- Pull request event: 37
- Fork event: 6
Committers metadata
Last synced: 10 days ago
Total Commits: 914
Total Committers: 15
Avg Commits per committer: 60.933
Development Distribution Score (DDS): 0.222
Commits in past year: 263
Committers in past year: 7
Avg Commits per committer in past year: 37.571
Development Distribution Score (DDS) in past year: 0.449
| Name | Commits | |
|---|---|---|
| Ghislain Picard | g****d@u****r | 711 |
| Hippolyte Signargout | h****t@u****r | 86 |
| mjsandells | m****s@c****k | 42 |
| NinaMaass | n****s@u****e | 24 |
| JulienMeloche | j****e@u****a | 20 |
| Ange Haddjeri | a****r@u****r | 9 |
| carlomarin | c****i@g****m | 5 |
| Mai Winstrup | m****i@d****k | 5 |
| Ghislain Picard | g****h@u****r | 4 |
| Janna | 9****r | 3 |
| linazsche | l****n@g****e | 1 |
| dependabot[bot] | 4****] | 1 |
| Robbie *ice-floe* Mallett | 4****t | 1 |
| Ben | 5****n | 1 |
| Mel Sandells | m****s@r****k | 1 |
Committer domains:
- univ-grenoble-alpes.fr: 4
- reading.ac.uk: 1
- gmx.de: 1
- dmi.dk: 1
- usherbrooke.ca: 1
- uni-hamburg.de: 1
- coresscience.co.uk: 1
Issue and Pull Request metadata
Last synced: 12 days ago
Total issues: 23
Total pull requests: 64
Average time to close issues: 10 months
Average time to close pull requests: 8 days
Total issue authors: 15
Total pull request authors: 11
Average comments per issue: 1.74
Average comments per pull request: 0.55
Merged pull request: 45
Bot issues: 0
Bot pull requests: 2
Past year issues: 3
Past year pull requests: 43
Past year average time to close issues: 3 months
Past year average time to close pull requests: 11 days
Past year issue authors: 2
Past year pull request authors: 6
Past year average comments per issue: 1.33
Past year average comments per pull request: 0.6
Past year merged pull request: 30
Past year bot issues: 0
Past year bot pull requests: 0
Top Issue Authors
- pikaqiu2002 (5)
- cryptomare (2)
- JulienMeloche (2)
- robbiemallett (2)
- carlettif (2)
- zz246 (1)
- easihene (1)
- ECCCBen (1)
- Anthony-MostlyHarmless (1)
- mjsandells (1)
- ghislainp (1)
- ferranhema (1)
- HeWhoLikesWaffles (1)
- bigleaffrog (1)
- carlomarin (1)
Top Pull Request Authors
- JulienMeloche (20)
- hsignarg (20)
- jannapolar (8)
- carlomarin (5)
- hexxawax (2)
- mjsandells (2)
- dependabot[bot] (2)
- maiwinstrup (2)
- robbiemallett (1)
- linazsche (1)
- ECCCBen (1)
Top Issue Labels
Top Pull Request Labels
- dependencies (2)
Package metadata
- Total packages: 2
-
Total downloads:
- pypi: 310 last-month
- Total dependent packages: 0 (may contain duplicates)
- Total dependent repositories: 2 (may contain duplicates)
- Total versions: 11
- Total maintainers: 1
proxy.golang.org: github.com/smrt-model/smrt
- Homepage:
- Documentation: https://pkg.go.dev/github.com/smrt-model/smrt#section-documentation
- Licenses: other
- Latest release: v1.5.1 (published 6 months ago)
- Last Synced: 2025-12-21T22:11:48.935Z (3 days ago)
- Versions: 2
- Dependent Packages: 0
- Dependent Repositories: 0
-
Rankings:
- Forks count: 5.018%
- Dependent packages count: 5.375%
- Average: 5.579%
- Dependent repos count: 5.736%
- Stargazers count: 6.188%
pypi.org: smrt
The Snow Microwave Radiative Transfer (SMRT) model is a highly modular model to compute the thermal emission and backscattering coefficient of snowpacks and other cryospheric bodies in the microwave domain.
- Homepage: https://http://smrt-model.science/l
- Documentation: http://smrt.readthedocs.io/
- Licenses: DISCLAIMER: This version of SMRT is an early release. As such, some components may not be fully implemented or may give rise to unexpected behaviour. Please use this software with caution, ask for assistance if needed, and let us know any feedback you may have. SMRT is Copyright (c) 2016 Ghislain Picard, Melody Sandells, Henning Löwe. Licensed under GNU LGPL: GNU LESSER GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License, supplemented by the additional permissions listed below. 0. Additional Definitions. 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- Latest release: 1.5.1 (published 6 months ago)
- Last Synced: 2025-12-21T22:11:47.640Z (3 days ago)
- Versions: 9
- Dependent Packages: 0
- Dependent Repositories: 2
- Downloads: 310 Last month
-
Rankings:
- Dependent packages count: 7.31%
- Forks count: 8.576%
- Stargazers count: 10.176%
- Dependent repos count: 11.798%
- Average: 20.128%
- Downloads: 62.779%
- Maintainers (1)
Dependencies
- matplotlib *
- numpy *
- pandas *
- scipy *
- xarray *
- Sphinx >=1.6
- importlib *
- karma_sphinx_theme *
- matplotlib *
- numpy *
- oct2py *
- pandas *
- pytest *
- scipy *
- six *
- uuid *
- xarray *
- nosetest develop
- numba >=0.40
- numpy >=1.13
- pandas >=0.20.3
- python >=3.6
- scipy >=1.0.0
- xarray >=0.10.3
- actions/checkout v3 composite
- actions/setup-python v4 composite
- actions/checkout v4 composite
- actions/download-artifact v3 composite
- actions/setup-python v4 composite
- actions/upload-artifact v3 composite
- pypa/gh-action-pypi-publish release/v1 composite
Score: 12.758318484846534