= PDAFomi_gather_obs = This page documents the routine `PDAFomi_gather_obs of PDAF-OMI. The routine ha to be called in `init_dim_obs_OBTYPE` in each observation module. It initializes the observation information for PDAF-OMI. || See the [wiki:OMI_observation_modules page describing PDAF-OMI observation modules] for the full documentation of OMI observation modules.|| The interface is: {{{ SUBROUTINE PDAFomi_gather_obs(thisobs, dim_obs_p, obs_p, ivar_obs_p, ocoord_p, & ncoord, lradius, dim_obs) TYPE(obs_f), INTENT(inout) :: thisobs ! Data type with full observation information INTEGER, INTENT(in) :: dim_obs_p ! Number of process-local observations REAL, INTENT(in) :: obs_p(:) ! Vector of process-local observations REAL, INTENT(in) :: ivar_obs_p(:) ! Vector of process-local inverse observation error variance REAL, INTENT(in) :: ocoord_p(:,:) ! Array of process-local observation coordinates INTEGER, INTENT(in) :: ncoord ! Number of rows (first index) of coordinate array REAL, INTENT(in) :: lradius ! Typical localization radius (the maximum radius used in this process domain) INTEGER, INTENT(out) :: dim_obs ! Full number of observations }}} '''Notes:''' * The only direect output is `dim_obs`, which is then returned to `init_dim_obs_pdafomi` in `callback_obs_pdafomi.F90`. * The value of `lradius` can be some maximum value. It is only utilized if domain-limited observations are activated ([wiki:OMI_use_global_obs see page on using the option `use_global_obs`])