Changes between Version 13 and Version 14 of AddFilterAlgorithm_PDAF3

Timestamp:

Apr 17, 2026, 1:33:26 PM (5 weeks ago)

Author:

lnerger

Comment:

--

AddFilterAlgorithm_PDAF3

@@ -13 +13 @@
 We provide templates for the implementation of global and local ensemble filter in the sub-directores of `templates/analysis_step/`.
 
+While DA methods should be implemented to generally work without PDAF-OMI, PDAF-OMI provides the environment for observation handling and localization which can be leveraged by a new DA method.
+
 == PDAF's Internal Interface ==
 
@@ -19 +21 @@
 The left column in Fig. 1 shows the generic PDAF routines, which are called from the user code. Here, `PDAF_init` calls 5 interface routines to perform the specific initialization of the DA method. The other generic routines are more focused and call only one interface routine each.
 
-The internal interface routines allowthe user to call the generic routines, which are then mapped to a specific routine of the DA method. The internal interface routines are depicted in the middle column of Fig. 1. All these routines are collected in the module `PDAF_utils_filters` in the file `PDAF_utils_filters.F90`. For each interface routine there is a specific routine of the DA method shown in the right-most column. These specific routines are collected in the module `PDAF_X` in the file `PDAF_X.F90`. The interface routines perform the initialization of a DA method, setting parameters or printing information about the configuration or the available options. 
-
-The assimilation routines, here the universal routines `PDAF3_assim_offline` and `PDAF3_assimilate`, directly call the specific assimilation routine of the DA method. These are stored the module in `PDAF_assimilate_X.F90.
+The internal interface routines allow the user to call the generic routines, which are then mapped to a specific routine of the DA method. The internal interface routines are depicted in the middle column of Fig. 1. All these routines are collected in the module `PDAF_utils_filters` in the file `PDAF_utils_filters.F90`. For each interface routine there is a specific routine of the DA method shown in the right-most column. These specific routines are collected in the module `PDAF_X` in the file `PDAF_X.F90`. The interface routines perform the initialization of a DA method, setting parameters or printing information about the configuration or the available options. 
+
+The assimilation routines, here the universal routines `PDAF3_assim_offline` and `PDAF3_assimilate`, directly call the specific assimilation routine of the DA method, which is stored the module in `PDAF_assimilate_X.F90`.
+
+Please note: The number of required subroutines is not low. However, these subroutines are well focused and implementing a new assimilation methods follows a clear approach. With this, the effort to add a data assimilation method based on the template codes, or on an already existing assimialtion methods, is not high. 
 
 [[Image(//pics/internal_interface_PDAF3.png)]]