Module oda_driver

Top level module for ocean data assimilation. Contains routines for initialization, termination and update of ocean data assimilation increments.

1.) Get Observations for current model time (and domain) based on data window (default=15 days). For PE subdomains, data are included if they lie within the region bounded by the cell centers on the first x/y halo extent.

2.) IF EAKF (!!not yet implemented!!) a.) ensemble state is distributed among NPES as follows: Ens01:0:(NPE1-1), Ens02:NPE1:(NPE1+NPE2-1),..., EnsN:sum(NPE1+...+NPE(N-1)):NPES b.) Redistribute state to ensemble vector using global PEset. (Ens01,...,EnsN):0:NPES c.) Calculate increments using Ensemble information. d.) Re-distribute increments to members and revert to original PEset. ELSE IF Var2d Minimize quadratic CF based on specfied prior correlation maps and optionally time-variant prior error variance. ELSE ???

ENDIF

3.) Apply increments to model state based on prior analysis. Distribute increments uniformly over analysis period if "do_iau=T".

4.) Check for convective instability after applying increments.

5.) Write Profile (observation space) first guess, analysis and mis-fits

========================================================================

OTHER MODULES USED

     ocean_types_mod
       oda_types_mod
        oda_core_mod
     mpp_domains_mod
             mpp_mod
          mpp_io_mod
    time_manager_mod
     ocean_grids_mod
     ocean_topog_mod
   ocean_convect_mod
   ocean_domains_mod
       constants_mod
 ocean_workspace_mod
write_ocean_data_mod
ensemble_manager_mod
             fms_mod
    diag_manager_mod

PUBLIC INTERFACE

PUBLIC DATA

PUBLIC ROUTINES

NAMELIST

Name	Type	Value	Units	Description
use_this_module	logical	---	---	use the oda module

&oda_nml

assim_method
assim_start_lat
assim_end_lat
nk_asm
assim_interval
do_iau
do_convect_adjust
max_profiles
max_sfc_obs

`Domain`	[ocean_domain_type]
`Grid`	[ocean_grid_type]
`Ocn_Time`	[ocean_time_type]
`T_prog`	[ocean_tracer_type(:)]
`Velocity`	[ocean_velocity_type]
`Ext_mode`	[ocean_external_mode_type]

`T_prog`	[ocean_prog_tracer_type(:)]
`Velocity`	[ocean_velocity_type]
`Ext_mode`	[ocean_external_mode_type]
`Thickness`	[ocean_thickness_type]
`Dens`	[ocean_density_type]