47 wiersze
3.0 KiB
Markdown
47 wiersze
3.0 KiB
Markdown
# CUSF Standalone Predictor - Version 2
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Cambridge University Spaceflight landing predictor - a web-based tool for predicting the flight path and landing location of latex meteorological sounding balloons.
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## Install
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The source for the predictor itself is in `pred_src/` and instructions for building it can be found there.
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The following items need to be executable (`chmod +x ./predict.py`) by the user under which the predictor runs:
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* `predict.py`
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* `pred_src/pred` (once compiled)
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* `cron/clear-pydap-cache-cronjob.sh`
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* `cron/purge-predictions-cronjob.sh`
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The `predict/preds/` and `gfs/` directories need to have rwx access by the PHP interpreter and the `predict.py` python script. You will need to install the python dependencies listed in requirements.txt. In the case of PyDAP, the exact version is important; the easiest way is:
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$ pip install -r requirements.txt
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Other than that, just clone this repo to a non web-accessible folder and create symlinks to the `predict/` directory in the repo.
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There are useful configuration options in `predict/includes/config.inc.php`.
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## Information
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The two shell scripts in the `cron/` directory should both be run daily. `clear-pydap-cache-cronjob.sh` clears the cache used by pydap so that old data does not build up. `purge-predictions-cronjob.sh` deletes scenarios and predictions not accessed or modified within the last 7 days. Re-running a prediction for a scenario will therefore reset its time to live to 7 more days.
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The directory names are UUIDs comprised of an SHA1 hash of the launch parameters, and re-running predictions will overwrite data in the existing directory, rather than create a new one.
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We use GFS data provided by the NOAA, accessed via NDAP and their [NOMADS](http://nomads.ncep.noaa.gov) distribution system. The [1.0x1.0 degree data](http://nomads.ncep.noaa.gov/txt_descriptions/GFS_high_resolution_doc.shtml) (26 vertical pressure levels) is used for standard predictions, and the [0.5x0.5 degree data](http://nomads.ncep.noaa.gov/txt_descriptions/GFS_half_degree_doc.shtml) (47 vertical pressure levels) is used for the high definition (HD) predictions.
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## License
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This work is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. This work is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.
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## Credits & Acknowledgments
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Credit as detailed in individual files, but notably:
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* Rich Wareham - The new predictor and the hourly predictor system
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* Fergus Noble, Ed Moore and many others
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Adam Greig - [http://www.randomskk.net](http://www.randomskk.net) - [random@randomskk.net](mailto:random@randomskk.net)
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Jon Sowman - [http://www.hexoc.com](http://www.hexoc.com) - [jon@hexoc.com](mailto:jon@hexoc.com)
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Copyright Cambridge University Spaceflight 2009-2011 - All Rights Reserved
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