Changes between Initial Version and Version 1 of U_init_obsvars


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Timestamp:
Mar 23, 2025, 9:01:09 AM (10 days ago)
Author:
lnerger
Comment:

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  • U_init_obsvars

    v1 v1  
     1= U_init_obsvars =
     2
     3The page documents the user-supplied call-back routine `U_init_obsvars`, which was introduced with PDAF V3.0.
     4
     5The routine `U_init_obsvars` is a call-back routine that has to be provided by the user.  The typical namem in user code is `init_obsvars_pdaf`, but the user can choose the name.
     6The routine is used only with the ENSRF/EAKF. The routine is called by PDAF during the analysis step and has to provide the filter with a vector of observation error variances.
     7
     8The interface is the following:
     9{{{
     10SUBROUTINE PDAFomi_init_obsvars_f_cb(step, dim_obs_f, var_f)
     11}}}
     12with arguments:
     13{{{
     14  INTEGER, INTENT(in) :: step           ! Current time step
     15  INTEGER, INTENT(in) :: dim_obs_f      ! Dimension of full observation vector
     16  REAL, INTENT(out) :: var_f(dim_obs_f) ! vector of observation error variances
     17}}}
     18
     19The variance vector `var_f` is for the full observation vector.
     20