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GSI-fix

ASCII files that are used in the GSI by various applications to describe the characteristics of the system.

These include (but are not limited to):

  • observation error specifications for conventional and satellite-based measurements
  • observation rejection and acceptance lists
  • background error covariance specifications
  • hybrid covariance weights
  • control and state vector descriptions

Binary files used by the GSI are NOT in GSI-fix. Instead, GSI binary fix files are available from two sources:

  • staged in directory GSI_BINARY_SOURCE_DIR on WCOSS2 and select NOAA RHDPCS machines. Variable GSI_BINARY_SOURCE_DIR is defined in GSI modulefiles/gsi_$machine.lua for some, but not all, machines.
  • downloadable as a tarball from https://ftp.emc.ncep.noaa.gov/static_files/public/gsi.

What files are what

The top level directory structure groups the files as follow:

File/directory Purpose
README.md This file with basic pointers to more information.
LICENSE.md A copy of the GNU Lesser General Public License, Version 3.
CMakeLists.txt CMakeLists file for use with GSI.
gsi_binary_files.cmake List of all binary files used in the GSI.

Disclaimer

The United States Department of Commerce (DOC) GitHub project code is provided on an "as is" basis and the user assumes responsibility for its use. DOC has relinquished control of the information and no longer has responsibility to protect the integrity, confidentiality, or availability of the information. Any claims against the Department of Commerce stemming from the use of its GitHub project will be governed by all applicable Federal law. Any reference to specific commercial products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply their endorsement, recommendation or favoring by the Department of Commerce. The Department of Commerce seal and logo, or the seal and logo of a DOC bureau, shall not be used in any manner to imply endorsement of any commercial product or activity by DOC or the United States Government.