= PDAF_put_state_prepost_si = This page documents the routine `PDAF_put_state_prepost_si` of PDAF. `PDAF_put_state_prepost_si` is the variant of [wiki:PDAF_put_state_prepost PDAF_put_state_prepost] 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. The routine is typically called in `assimilate_pdaf` or directly in the model code. The routine `PDAF_put_state_prepost_si` is an alternative to the routines `PDAF_put_state_X_si` where 'X' is the name of a filter method. The routine can be used with the 'flexible' implementation variant of PDAF. The purpose of `PDAF_put_state_prepost_si` is to collect the ensemble information on the processes usually doing the filter analysis. However, in the case of `PDAF_put_state_prepost_si`, no filter analysis step is performed when the ensemble integration is complete, but only the user-supplied pre/poststep routine is called to allow the user to analyze the forecast ensemble. The general aspects of the filter specific routines `PDAF_put_state_*` are described on the page [ModifyModelforEnsembleIntegration Modification of the model code for the ensemble integration] and its sub-page on [InsertAnalysisStep inserting the analysis step]. For the 'fully parallel' implementation variant the alternative routine `PDAF_prepost` is used. The routines `PDAF_put_state_*` are used with the 'flexible' implementation variant of PDAF. The general aspects of the filter specific routines `PDAF_put_state_*` are described on the page [ModifyModelforEnsembleIntegration Modification of the model code for the ensemble integration] and its sub-page on [InsertAnalysisStep inserting the analysis step]. For the 'fully parallel' implementation variant the alternative routines `PDAF_assimilate_*_si` are used. The interface is the following: {{{ SUBROUTINE PDAF_put_state_prepost_si(status_pdaf) }}} with the following arguments: * `status_pdaf`: The integer status flag. It is 0, if `PDAF_put_state_prepost_si` is exited without errors. The routine calls several user-supplied call-back routines. They are described on the page on [ImplementAnalysisestkf implementing the analysis step of the ESTKF algorithm]. It is recommended that the value of `status_pdaf` is checked in the program after `PDAF_put_state_prepost_si` is executed. Only if its value is 0 the initialization was successful.