Changes between Version 12 and Version 13 of PdafTutorial


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Timestamp:
Nov 30, 2020, 10:21:39 AM (3 months ago)
Author:
lnerger
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  • PdafTutorial

    v12 v13  
    11= Implementation Tutorials =
     2
     3== The tutorial model ==
     4
     5The tutorial implementation uses a simple 2-dimensional model domain with a single model field.
     6 * [http://pdaf.awi.de/files/pdaf_tutorial_the_model.pdf PDAF Tutorial: The tutorial model: non-parallel and parallel versions] (PDF, 0.6 MB)[[BR]]
    27
    38== Implementing the online mode of PDAF ==
    49
    5 In the online mode of PDAF one couples PDAF to a model into a single assimilation program. Since version 1.10 of PDAF, tutorial implementations of the online analysis step are included in the PDAF source code package. The tutorial implementation uses a simple 2-dimensional model domain with a single model field. The implementation is done from the templates provided in /templates/online of the source code package. Two implementations are demonstrated: The case that the model itself is not parallelized and the case that the model is parallelized (i.e. if field is decomposed over several processes).
     10In the online mode of PDAF one couples PDAF to a model into a single assimilation program. With version 1.16 we introduced PDAF-OMI, the [wiki:PDAF_OMI_Overview Observation Module Infrastructure]. The tutorials are adapted for OMI, while tutorials describing the implementation without OMI are provided further below. The implementation is done from the templates provided in /templates/online of the source code package. Two implementations are demonstrated: The case that the model itself is not parallelized and the case that the model is parallelized (i.e. if field is decomposed over several processes).
    611
    7 Step-by-step descriptions of the required implementation steps are provided by the following slide sets (the described features are supported from PDAF 1.13): [[BR]]
    8  * [http://pdaf.awi.de/files/pdaf_tutorial_onlineserial.pdf PDAF Tutorial: Implementation of the assimilation system with a model that is not parallelized] (PDF, 2.9 MB)[[BR]]
    9  * [http://pdaf.awi.de/files/pdaf_tutorial_onlineparallel.pdf PDAF Tutorial: Implementation of the assimilation system with a parallelized model] (PDF, 2.8 MB)[[BR]]
     12Step-by-step descriptions of the required implementation steps are provided by the following slide sets (the described features are supported from PDAF 1.16): [[BR]]
     13 * [http://pdaf.awi.de/files/pdaf_tutorial_onlineserial.pdf PDAF Tutorial: Implementation of the assimilation system with a model that is not parallelized] (PDF, 0.9 MB)[[BR]]
     14 * [http://pdaf.awi.de/files/pdaf_tutorial_onlineparallel.pdf PDAF Tutorial: Implementation of the assimilation system with a parallelized model] (PDF, 0.9 MB)[[BR]]
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    1116== Implementing the offline analysis step ==
    1217
    13 Since version 1.9 of PDAF, a tutorial implementation of the offline analysis step is included in the PDAF source code package. The tutorial implementation uses a simple 2-dimensional model domain with a single model field. The implementation is done from the templates provided in /templates/offline of the source code package.
     18In the offline mode of PDAF one uses separate programs for the model and the data assimilation. The implementation is done from the templates provided in /templates/offline of the source code package. The tutorial describes the implementation with PDAF-OMI that was introduced with version 1.16.
    1419
    15 A step-by-step description of the required implementation steps is provided by the following slide set (the described features are supported from PDAF 1.13): [[BR]]
    16  * [http://pdaf.awi.de/files/pdaf_tutorial_offline.pdf PDAF Tutorial: Implementation of the analysis step in offline mode] (PDF, 3.2 MB)
     20A step-by-step description of the required implementation steps is provided by the following slide set (the described features are supported from PDAF 1.16): [[BR]]
     21 * [http://pdaf.awi.de/files/pdaf_tutorial_offline.pdf PDAF Tutorial: Implementation of the analysis step in offline mode] (PDF, 0.8 MB)
     22
     23
     24== Implementing without using PDAF-OMI ==
     25
     26With PDAF version 1.16 we introduced PDAF-OMI (Observation Module Infrastructure). We recommend to use this new way to implement observationhandling more efficiently. However, implementing without OMI is still possible and here we provide the tutorial slides for this case:
     27
     28Step-by-step descriptions of the required implementation steps are provided by the following slide sets (the described features are supported from PDAF 1.16): [[BR]]
     29Online mode:[[br]]
     30 * [http://pdaf.awi.de/files/pdaf_tutorial_onlineserial_classical.pdf PDAF Tutorial: Implementation of the assimilation system without OMI with a model that is not parallelized] (PDF, 0.9 MB)[[BR]]
     31 * [http://pdaf.awi.de/files/pdaf_tutorial_onlineparallel_classical.pdf PDAF Tutorial: Implementation of the assimilation system without OMI with a parallelized model] (PDF, 0.9 MB)[[BR]]
     32Offline model[[br]]
     33 * [http://pdaf.awi.de/files/pdaf_tutorial_offline_classical.pdf PDAF Tutorial: Implementation of the analysis step in offline mode without OMI] (PDF, 1.0 MB)
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    2340   * [wiki:OfflineImplementationGuide Implementation Guide for the offline assimilation program]
    2441   * [wiki:AvailableOptionsforInitPDAF Overview of filter-specific options]
     42   * [wiki:PDAF_OMI_Overview Overview of PDAF-OMI]
    2543   * [wiki:WhichFiltertouse Which filter should one use?]
    2644   * [wiki:AddFilterAlgorithm Adding a filter algorithm to PDAF]