Changes between Version 14 and Version 15 of AddFilterAlgorithm

Timestamp:

Dec 4, 2011, 11:45:03 AM (14 years ago)

Author:

lnerger

Comment:

--

AddFilterAlgorithm

@@ -40 +40 @@
 
 When `PDAF_init` is called, the filter algorithm is chosen by its ID number. Internally to PDAF, each filter is identified by a string that is defined in `PDAF_init_filters`. The interface routines have a very simple structure. In general, they select the filter-specific routine based on the string identifying the filters. When a filter algorithm is added a line for the corresponding filter-specific routine has to be inserted to each of the interface routines. 
+
+== Internal dimensions ==
+
+PDAF internally stores the dimensions of the assimilation system. The dimensions are declared in the Fortran module `PDAF_mod_filter`. Important are the following dimensions:
+ * `dim_p`: The size of the state vector (with parallelization the size of the local state vector for the current process)
+ * `dim_ens`: The total size of the ensemble
+ * `dim_ens_l`: If the ensemble integration is distributed over several ensemble tasks, this variable stores the size of the sub-ensemble handled by the current process. (`dim_ens_l` equals `dim_ens` if no parallelization or if only a single model task is used.)
+ * `rank`: The maximum rank of the ensemble covariance matrix. In almost all cases, it is `dim_ens-1`.
+ * `dim_eof`: For mode based filters (currently only SEEK), this is the number of modes used in the state covariance matrix.
 
 == Filter-specific routines ==