PDAFlocal_put_state_lseik
This page documents the routine PDAFlocal_put_state_lseik
of PDAF using the PDAFlocal interface that was introduced with PDAF V2.3.
The routine is typically called in assimilate_pdaf
or directly in the model code.
The routines PDAFlocal_put_state_*
are used with the 'flexible' implementation variant of PDAF.
The general aspects of the filter specific routines PDAFlocal_put_state_*
are described on the page Modification of the model code for the ensemble integration and its sub-page on inserting the analysis step. For the 'fully parallel' implementation variant the alternative routines PDAFlocal_assimilate_*
are used.
The interface when using the LSEIK filter is the following:
SUBROUTINE PDAFlocal_put_state_lseik(U_collect_state, U_init_dim_obs_f, U_obs_op_f, U_init_obs_f, & U_init_obs_l, U_prepoststep, U_prodRinvA_l, U_init_n_domains, & U_init_dim_l, U_init_dim_obs_l, & U_g2l_obs, & U_init_obsvar, U_init_obsvar_l, status_pdaf)
with the following arguments:
U_collect_state
: The name of the user-supplied routine that initializes a state vector from the array holding the ensemble of model states from the model fields. This is basically the inverse operation toU_distribute_state
used in PDAF_get_state.U_init_dim_obs_f
: The name of the user-supplied routine that provides the size of the full observation vectorU_obs_op_f
: The name of the user-supplied routine that acts as the full observation operator on some state vectorU_init_obs_f
: The name of the user-supplied routine that initializes the full vector of observationsU_init_obs_l
: The name of the user-supplied routine that initializes the vector of observations for a local analysis domainU_prepoststep
: The name of the pre/poststep routine as inPDAF_get_state
U_prodRinvA_l
: The name of the user-supplied routine that computes the product of the inverse of the observation error covariance matrix with some matrix provided to the routine by PDAF.U_init_n_domains
: The name of the routine that provides the number of local analysis domainsU_init_dim_l
: The name of the routine that provides the state dimension for a local analysis domainU_init_dim_obs_l
: The name of the routine that initializes the size of the observation vector for a local analysis domainU_g2l_obs
: The name of the routine that initializes a local observation vector from a full observation vectorU_init_obsvar
: The name of the user-supplied routine that provides a global mean observation error variance (This routine will only be executed, if an adaptive forgetting factor is used)U_init_obsvar_l
: The name of the user-supplied routine that provides a mean observation error variance for the local analysis domain (This routine will only be executed, if a local adaptive forgetting factor is used)status_pdaf
: The integer status flag. It is zero, if the routine is exited without errors.
Note:
- The order of the routine names does not show the order in which these routines are executed. See the section on the order of the execution on the page on implementing the analysis step of the LSEIK filter.
The user-supplied call-back routines are described on the page on implementing the analysis step of the LSEIK filter.
It is recommended that the value of status_pdaf
is checked in the program after the routine is executed. Only if its value is 0 the initialization was successful.
PDAF also has a Simplified Interface providing the routine PDAFlocal_put_state_lseik_si
. In the simplified interface, the name of the user-supplied routines have predefined names and do not appear in the call to PDAFlocal_put_state_lseik_si
. More information on the pre-defined names is provided in the page on implementing the analysis step of the LSEIK filter.