The PyIGRA Package
The National Centres for Environmental Information provides a large global archive for vertical soundings also known as radiosondes. PyIGRA downloads and extracts data from the Integrated Global Radiosonde Archive data set and prepares them in a more handy data format.
NOTE: Slightly changed output format. The data set provides information about the nominal time (date/time when the sounding was planned) and a release time (actual release time). In an earlier version I've tried to combine them in a simple way which was not always correct. I've decided to return the full information.
NOMINAL: nominal date/hour of the sounding (format
HHcan be 99 (missing).
RELEASE: release time, format is
HHMM(hour/minute). Can be
2359. If minute is missing the last two digits are
99. If both, hour and minute is missing, a
For more details please read the data set format description file.
cd PyPackage sudo python setup.py install
Requires the two additional python modules
Using the PyIGRA Package
There is a script called PyIGRA_test.sh which provides an example of the main functionality of the PyIGRA package
# Searching for a station, in this case Innsbruck PyIGRA_search --id inns # Should print "AUM00011120 47.2603 11.3439 581.0 INNSBRUCK-FLUGHAFEN ... # Where the first part (AUM00011120) is the ID we need to download the data PyIGRA --id AUM00011120 -o test1.txt PyIGRA --id AUM00011120 -p PRESSURE,TEMPERATURE -o test2.txt # Additional arguments: # For testing/development: only print the first 2 entries PyIGRA --id AUM00011120 -l 2 # Keep zip file after download. If PyIGRA is called again (and the # zip file exists on disc) no download will be required. PyIGRA --id AUM00011120 --keep # Change output format (only extract TEMPERATURE and PRESSURE PyIGRA --id AUM00011120 --parameters TEMPERATURE,PRESSURE
PyIGRA_seach is reading the latest station list and can be used to get the proper station identifier (-i/--id) needed for the PyIGRA executable. PyIGRA is downloading a zip file from the ftp server, extracts the data, and outputs the data in a new format. In this case the data will be piped into the output file (-o/--output) as specified in the script.
- Autor: Reto Staufferuibk.ac.at
- Date: 2016-10-11
- License: GPL3+
A detailed description of the IGRA2 data format:
- ftp://ftp.ncdc.noaa.gov/pub/data/igra/igra2-list-format.txt (station list format)
- ftp://ftp.ncdc.noaa.gov/pub/data/igra/data/igra2-data-format.txt (data format)
Station list used by PyIGRA_search:
Direct data access: