Changes between Initial Version and Version 1 of init_dim_obs_pdaf


Ignore:
Timestamp:
Jan 21, 2015, 4:06:26 PM (6 years ago)
Author:
lnerger
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • init_dim_obs_pdaf

    v1 v1  
     1= `init_dim_obs_pdaf` =
     2
     3The page document the user-supplied call-back routine `init_dim_obs_pdaf`.
     4
     5The routine `init_dim_obs_pdaf` (called `U_init_dim_obs` inide the PDAF core routines) is a call-back routine that has to be provided by the user. The routine is used with all global filters. The purpose of the routine is to determine the size of the vector of observations.
     6The routine is called at the beginning of each analysis step.
     7
     8The interface is the following:
     9{{{
     10SUBROUTINE init_dim_obs_pdaf(step, dim_obs_p)
     11}}}
     12with
     13 * `step` : `integer, intent(in)`[[BR]] Current time step
     14 * `dim_obs_p` : `integer, intent(out)[[BR]] Size of the observation vector
     15
     16Notes:
     17 * Without parallelization `dim_obs_p` will be the number of observations for the full model domain. When a domain-decomposed model is used, `dim_obs_p` will be the size of the observation vector for the sub-domain of the calling process.
     18
     19Some hints:
     20 * It can be useful to not only determine the size of the observation vector at this point. One can also already gather information about the locations of the observations, which will be used later, e.g. to implement the observation operator. An array for the locations can be defined in a module like `mod_assimilation` of the example implementation.