Changes between Version 3 and Version 4 of PDAF_OMI_Overview_PDAF3


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Timestamp:
May 27, 2025, 3:01:58 PM (5 days ago)
Author:
lnerger
Comment:

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  • PDAF_OMI_Overview_PDAF3

    v3 v4  
    111111
    112112The current version of PDAF-OMI has a few limitations
    113  - PDAF V2.3 added support for non-diagonal observation error covariance matrices **R** while previous versions only supported diagonal observation error covariance matrices  (though, the observation variances can vary). Using nondiagonal **R**-matrices, requires a user-supplied code for operations relating to **R** (see the documentation on the implemenetation for [wiki:OMI_nondiagonal_observation_error_covariance_matrices using non-diagonal R-matrices with OMI])
     113 -  Using nondiagonal **R**-matrices, requires a user-supplied code for operations relating to **R** (see the documentation on the implemenetation for [wiki:nondiagonal_observation_error_covariance_matrices_PDAF3 using non-diagonal R-matrices with OMI])
    114114 - OMI currently only includes observation operators with linear interpolation and for observation located at grid points.
    115115 - We have not tested interoperability with other programming languages. Generally Fortran derived data types and C structs should be compatible. Obviously, taking the Fortran routines and calling C functions to perform the actual initializations will work. (However, pyPDAF provides interoperability with Python).