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Changes between Version 22 and Version 23 of GeneralImplementationConcept

v22	v23
42	42	* The assimilation system for the online mode can make efficient use of a large number of processors by executing a single program containing the full assimilation system. In contrast, in the offline mode, separate programs for the forecasts and the assimilation have to be run, each of these use typically less processors.
43	43
	44	Generally the user-provided code for the analysis step is very similar for the online and offline modes. The difference is mainly that in the online mode, one can access model fields and model grid information from the model source code (usually Fortran modules, if the model is programmed in Fortran) while in the offline mode one need to read the model fields and grid information from files. Oen can implement this in a way that for the offline mode mainly there reading routines are used in the initialization phase, while all other subroutines remain independent on how the model fields and gird information are obtained.
	45
44	46	The implementation concepts of the online and offline modes of PDAF are described on separate pages:
45	47	* [ImplementationConceptOnline Online mode: Attaching PDAF to a model]