| 100 | == Some Known Limitations == |

| 101 | |

| 102 | The current version of PDAF-OMI has a few limitations |

| 103 | - OMI currently only supports diagonal observation error covariance matrices (though, the observation variances can vary). |

| 104 | - OMI currently only includes observation operators with linear interpolation. |

| 105 | - We have not tested interoperability with other programming languages than Fortran. 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. |