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GSI System

You may download the following versions of the GSI system source codes (including GSI code, libraries, fixed files and sample run script) from this site.

• Community GSI system Version 2.0: released on April 27, 2010
• Community GSI system Version 1.0: released on September 25, 2009
To begin downloading the GSI system or become a registered GSI user (first time only), Please enter your e-mail address:
  

Testing Data

DTC provides some real case data for testing purposes. Please click here to download the data.

Observation Resources

The GSI requires specific data formats for observations to be assimilated:
• Conventional observations (including satellite derived data, e.g., satellite wind):
  PREPBUFR format (NCEP featured BUFR format)
• Satellite radiance data, GPS radio occultation data, Radar observations:
  BUFR format
Descriptions about the data formats and links to some data resources are provided here .

External Libraries Needed To Build GSI

The follow libraries are not in GSI release package but needed for GSI building:

• Compiled WRF ARW or WRF-NMM Version 3.0 or above
  
• netCDF: build with the same compiler with WRF and GSI
  
• For systems other than the IBM, the LAPACK and BLAS libraries may be needed. Check with your system administrator to see if local versions of these libraries already exist on your system.

Please direct questions regarding GSI to GSI Helpdesk.
Please direct feedback or suggestions regarding GSI to GSI Feedback.