Fix DA use_obs_errfac for multiple outerloops #1288
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modified: var/da/da_minimisation/da_get_innov_vector.inc
liujake
approved these changes
Sep 15, 2020
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TYPE: bug fix
KEYWORDS: WRFDA, use_obs_errfac, max_ext_its > 1
SOURCE: Jamie Bresch (NCAR)
DESCRIPTION OF CHANGES:
Problem:
CWB reported seeing obs errors keep decreasing with each outerloop.
Solution:
Add a check for outerloop number, so that when use_obs_errfac=true and errfac.dat exists in the working directory, observation error factors are applied only at the first outerloop.
LIST OF MODIFIED FILES:
M var/da/da_minimisation/da_get_innov_vector.inc
TESTS CONDUCTED:
RELEASE NOTE: Bug fix for WRFDA's incorrectly applying errfac.dat at each outerloop when use_obs_errfac=true and max_ext_its > 1.