Changes between Initial Version and Version 1 of PDAF_gather_dim_obs_f


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Timestamp:
Dec 20, 2017, 5:20:41 PM (7 years ago)
Author:
lnerger
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  • PDAF_gather_dim_obs_f

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     1= PDAF_gather_dim_obs_f =
     2
     3This page documents the routine `PDAF_gather_dim_obs_f` of PDAF, which was introduced with PDAF V1.13.
     4
     5In the local filters (LESKTF, LETKF, LSEIK, LNETF) this routine gathers the total observation dimension from process-local observation dimensions and returns this dimension.
     6
     7The routine has to be called once before using any of the routines [wiki:PDAF_gather_obs_f] or [wiki:PDAF_gather_obs_f2]. This is because it stores the information on the process-local observation dimensions to enable the gathering operations in the two other routines.
     8
     9
     10The routine is typically used in the routine `init_dim_obs_f` if the analysis step of the local filters is parallelized.
     11
     12The interface is the following:
     13{{{
     14  SUBROUTINE PDAF_gather_dim_obs_f(dim_obs_p, dim_obs_f)
     15}}}
     16with the following arguments:
     17 * `dim_obs_p` : `integer, intent(in)`[[BR]] Process-local dimension of state vector
     18 * `dim_obs_f` : `integer, intent(out)`[[BR]] Full dimension of state vector
     19
     20Notes:
     21 * It is allowed to compute `PDAF_gather_dim_obs_f` multiple times. However, the calls to `PDAF_gather_obs_f` and `PDAF_gather_obs_f2` will use the dimensions defined in the most recent call to `PDAF_gather_dim_obs_f`