Changes between Initial Version and Version 1 of PDAFomi_generate_obs_si


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Timestamp:
Dec 8, 2021, 5:42:15 PM (3 years ago)
Author:
lnerger
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  • PDAFomi_generate_obs_si

    v1 v1  
     1= PDAFomi_generate_obs_si =
     2
     3This page documents the routine `PDAFomi_generate_obs_si` of PDAF.
     4
     5The routine is typically called in `assimilate_pdaf` or directly in the model code.
     6
     7`PDAFomi_generate_obs` is the variant of [wiki:PDAFomi_generate_obs PDAFomi_generate_obs] with the [PdafSimplifiedInterface simplified interface]. The difference between both routines is that in the simplified interface the names of the call-back subroutines are not specified. Instead the routine assumes that the call-back routines have a standard name as specified at the end of this page.
     8
     9This routine is used to generate synthetic observations.
     10
     11The routine bases on the usual implementation strategy for PDAF which is described on the page [ModifyModelforEnsembleIntegration Modification of the model code for the ensemble integration] and its sub-page on [InsertAnalysisStep inserting the analysis step]. The routine is used in the fully-parallel implementation variant of the data assimilation system. When the 'flexible' implementation variant, the routine `PDAFomi_put_state_generate_obs' is used.
     12
     13The interface is the following:
     14{{{
     15  SUBROUTINE PDAFomi_generate_obs_si(status_pdaf)
     16}}}
     17with the following arguments:
     18 * `status_pdaf`: The integer status flag. It is zero, if `PDAFomi_generate_obs_si` is exited without errors.
     19
     20The routine calls several user-supplied call-back routines. They are described on the page on [ImplementGenerateObs implementing the generation of synthetic observations].
     21
     22It is recommended that the value of `status_pdaf` is checked in the program after `PDAFomi_generate_obs_si` is executed. Only if its value is 0 the initialization was successful.