Changes between Version 21 and Version 22 of OMI_observation_operators
 Timestamp:
 Dec 18, 2021, 1:57:06 PM (2 years ago)
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OMI_observation_operators
v21 v22 159 159 The arguments of the observation operators are 160 160 {{{ 161 CALL PDAFomi_obs_op_X (thisobs,[nrows,] state_p, ostate) 161 CALL PDAFomi_obs_op_adj_X (thisobs,[nrows,] state_p, ostate) 162 163 TYPE(obs_f), INTENT(inout) :: thisobs ! Data type with full observation 164 INTEGER, INTENT(in) :: nrows ! Number of values to be averaged 165 REAL, INTENT(in) :: obs_f_all(:) ! Full observed state for all observation types (array provided by PDAF) 166 REAL, INTENT(inout) :: state_p(:) ! Processlocal model state (provided by PDAF) 162 167 }}} 163 168 Where `thisobs` is the observation type variable, `ostate` is the input vector in the observation space provided by PDAF and `state_p` is the output state vector that will be returned to PDAF. `nrows` only exists for the observation operators X=gridavg and X=interp_lin and specifies the number of grid points involved in the observation operation. For X=gridpoint, this argument does not exist. … … 168 173 The current set of observation operators provided by PDAFOMI is rather fundamental. However, there are also observation types which are not variables of state vector, but functions of several values. Likewise one might want to use a more sophisticated interpolation than the linear one or some interpolation that treats the horizontal and vertical directions separately. For these cases you can implement you own operators. 169 174 170  The template observation operator in '''/template/omi/ob_op_pdafomi_TEMPLATE.F90'''can be used as the basis for the implementation. It describes the steps needs in the implementation. 175  The '''template observation operator''' in `/template/omi/ob_op_pdafomi_TEMPLATE.F90` can be used as the basis for the implementation. It describes the steps needs in the implementation.  171 176 172 177 Each observation operator include the following functionality: