PDAF_generate_obs_offline

This page documents the routine PDAF_generate_obs_offline of PDAF.

The routine is used for the offline coupled mode of PDAF, which is described on the page: Implementation Guide for Offline Coupling.

The interface is the following:

  SUBROUTINE PDAF_generate_obs_offline(U_init_dim_obs_f, U_obs_op_f, U_get_obs_f, &
                                  U_init_obserr_f, U_prepoststep, status_pdaf)

with the following arguments:

• U_init_dim_obs_f: The name of the user-supplied routine that provides the size of the full observation vector
• U_obs_op_f: The name of the user-supplied routine that acts as the full observation operator on some state vector
• U_get_obs_f: The name of the user-supplied routine that receives the full vector of generated synthetic observations from PDAF
• U_init_obserr_f: The name of the user-supplied routine that initializes the vector of observations error standard deviations for for full observation vector
• U_prepoststep: The name of the pre/poststep routine as in PDAF_get_state
• status_pdaf: The integer status flag. It is zero, if the routine is exited without errors.

The user-supplied call-back routines are described on the page on implementing the generation of synthetic observations.

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.