Changes between Version 11 and Version 12 of ReleaseNotes


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Timestamp:
Feb 12, 2012, 3:01:14 PM (7 years ago)
Author:
lnerger
Comment:

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  • ReleaseNotes

    v11 v12  
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    4 == Version 1.7 - September 16, 2011 ==
     4== Version 1.8 - February 12, 2012 ==
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    66Changes:[[BR]]
    7  * Revised internal structure of PDAF to simplify implementation of additional assimilation methods.
    8  * Added full data assimilation implementation of Lorenz-96 model with PDAF.
    9  * Revision of observation localization. It also includes the regulated localization that was introduced in the paper "A regulated localization scheme for ensemble-based Kalman filters" by L. Nerger et al. to appear in Q. J. Roy. Meteor. Soc. (accessible online: DOI:10.1002/qj.945)
    10  * Added an option to display parameter options for a selected filter using the compiled program.
    11  * Added routines with a simplified interface. The simplified interface does not require that you provide the names of user-supplied subroutines int he call to PDAF. However, one is restricted to use pre-defined routine names.
    12  * License change: Now PDAF is licensed with the more flexible Lesser GNU Public License (older versions of PDAF used the GNU Public License).
     7 * Added Error Subspace Transform Kalman filter (ESTKF) and localized variant LESTKF. In addition a variant of the SEIK filter with symmetric square-root and explicit ensemble transformation is now available. (These filers have been introduced in the article: "A unification of ensemble square-root filters" by L. Nerger, T. Janjic, J. Schroeter, and W. Hiller to appear in the Monthly Weather Review in 2012. [http://pdaf.awi.de/files/SEIK-ETKF-ESTKF.pdf accepted manuscript]
     8 * Added support to specify the type of the matrix square root in the SEIK filter. (Cholesky decomposition or symmetric square root based on singular value decomposition. The effects of these square root are also discussed in the paper mentioned above.)
     9 * Revised the internal structure of PDAF to simplify the implementation of additional filters.
     10 * Added support to compile for either double or single precision.
     11 * Clean-up of PDAF's internal timers and memory allocation counting.
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