Changes between Initial Version and Version 1 of PDAFomi_obs_op_adj_interp_lin


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Timestamp:
Dec 18, 2021, 1:20:45 PM (12 months ago)
Author:
lnerger
Comment:

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  • PDAFomi_obs_op_adj_interp_lin

    v1 v1  
     1= PDAFomi_obs_op_adj_interp_lin =
     2
     3This page documents the routine `PDAFomi_obs_op_adj_interp_lin` of PDAF-OMI.
     4
     5The routine provides an adjoint observation operator for observations that are computed as the linear interpolation between some grid point values in the state vector. It is usually called in `obs_op_OBSTYPE` in an [wiki:OMI_observation_modules OMI observation module] if a 3D-Var method is used.
     6
     7|| See the [wiki:OMI_observation_operators page describing PDAF-OMI observation operators] for a general overview.||
     8
     9The interface is:
     10{{{
     11  SUBROUTINE PDAFomi_obs_op_adj_interp_lin(thisobs, nrows, obs_f_all, state_p)
     12
     13    TYPE(obs_f), INTENT(inout) :: thisobs  ! Data type with full observation
     14    INTEGER, INTENT(in) :: nrows           ! Number of values to be averaged
     15    REAL, INTENT(in)    :: obs_f_all(:)    ! Full observed state for all observation types (array provided by PDAF)
     16    REAL, INTENT(inout) :: state_p(:)      ! Process-local model state provided by PDAF
     17}}}
     18
     19'''Note:'''
     20 * The necessary index information for the observation operator was initialized in `init_obs_OBSTYPE` of the observation module.
     21 * The interpolation coefficients have to be initialized in `init_ob_OBSTYPE` of the observation module.