Changes between Initial Version and Version 1 of PDAF_prepost_si

Timestamp:

Jan 16, 2015, 11:09:50 AM (10 years ago)

Author:

lnerger

Comment:

--

PDAF_prepost_si

@@ +1 @@
+= PDAF_prepost_si =
+
+This page documents the routine `PDAF_prepost_si` of PDAF. 
+
+`PDAF_prepost_si` is the variant of [wiki:PDAF_prepost PDAF_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_prepost_si` is an alternative to the routines `PDAF_assimilate_X_si` where 'X' is the name of a filter method. 
+The routine can be used with the 'fully parallel' implementation variant of PDAF. The purpose of `PDAF_prepost_si` is to collect the ensemble information on the processes usually doing the filter analysis. However, in the case of `PDAF_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 interface is the following:
+{{{
+  SUBROUTINE PDAF_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 two user-supplied call-back routines. They are described, for example, 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_prepost_si` is executed. Only if its value is 0 the initialization was successful.