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DART includes a flexible, powerful, and slightly complicated mechanism
for incorporating new types of observations. The
obs_def_ocean_mod module
being described here is used by the program
preprocess
to insert appropriate definitions of ocean observations into the
DEFAULT_obs_def_mod.f90 template and
generate the source files
obs_def_mod.f90 and
obs_kind_mod.f90
that are used by
filter and other DART programs.
There are no code segments in this module, only definitions of observation types
that map specific observation types to generic observation quantities. DART contains
logic that supports a limited inheritance of attributes. If you need to interpolate
observations of 'FLOAT_TEMPERATURE', DART will check to see if a specific routine
is provided for that type, if none exists, the interpolation routine for the
generic 'QTY_TEMPERATURE' will be used; that way one interpolation routine may
support many observation types.
The mandatory header line is followed by lines
that have the observation type name (an all caps Fortran 90 identifier) and
their associated generic quantity identifier from the obs_kind module.
If there is no special processing needed for an observation type,
and no additional data needed beyond the standard contents of an observation,
then a third word on the line, the COMMON_CODE will
instruct the preprocess program to automatically generate all stubs and
code needed for this type. For observation types needing any special code
or additional data, this word should not be specified and the user must
supply the code manually. One of the future extensions of this module will
be to support acoustic tomographic observations, which will
necessitate specific support routines.
! BEGIN DART PREPROCESS KIND LIST !SALINITY, QTY_SALINITY, COMMON_CODE !TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !U_CURRENT_COMPONENT, QTY_U_CURRENT_COMPONENT, COMMON_CODE !V_CURRENT_COMPONENT, QTY_V_CURRENT_COMPONENT, COMMON_CODE !SEA_SURFACE_HEIGHT, QTY_SEA_SURFACE_HEIGHT, COMMON_CODE !ARGO_U_CURRENT_COMPONENT, QTY_U_CURRENT_COMPONENT, COMMON_CODE !ARGO_V_CURRENT_COMPONENT, QTY_V_CURRENT_COMPONENT, COMMON_CODE !ARGO_SALINITY, QTY_SALINITY, COMMON_CODE !ARGO_TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !ADCP_U_CURRENT_COMPONENT, QTY_U_CURRENT_COMPONENT, COMMON_CODE !ADCP_V_CURRENT_COMPONENT, QTY_V_CURRENT_COMPONENT, COMMON_CODE !ADCP_SALINITY, QTY_SALINITY, COMMON_CODE !ADCP_TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !FLOAT_SALINITY, QTY_SALINITY, COMMON_CODE !FLOAT_TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !DRIFTER_U_CURRENT_COMPONENT, QTY_U_CURRENT_COMPONENT, COMMON_CODE !DRIFTER_V_CURRENT_COMPONENT, QTY_V_CURRENT_COMPONENT, COMMON_CODE !DRIFTER_SALINITY, QTY_SALINITY, COMMON_CODE !DRIFTER_TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !GLIDER_U_CURRENT_COMPONENT, QTY_U_CURRENT_COMPONENT, COMMON_CODE !GLIDER_V_CURRENT_COMPONENT, QTY_V_CURRENT_COMPONENT, COMMON_CODE !GLIDER_SALINITY, QTY_SALINITY, COMMON_CODE !GLIDER_TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !MOORING_U_CURRENT_COMPONENT, QTY_U_CURRENT_COMPONENT, COMMON_CODE !MOORING_V_CURRENT_COMPONENT, QTY_V_CURRENT_COMPONENT, COMMON_CODE !MOORING_SALINITY, QTY_SALINITY, COMMON_CODE !MOORING_TEMPERATURE, QTY_TEMPERATURE, COMMON_CODE !SATELLITE_MICROWAVE_SST, QTY_TEMPERATURE, COMMON_CODE !SATELLITE_INFRARED_SST, QTY_TEMPERATURE, COMMON_CODE !SATELLITE_SSH, QTY_SEA_SURFACE_HEIGHT, COMMON_CODE !SATELLITE_SSS, QTY_SALINITY, COMMON_CODE ! END DART PREPROCESS KIND LIST
New observation types may be added to this list with no loss of generality. Supporting the observations and actually assimilating them are somewhat different and is controlled by the input.nml&obs_kind_nml assimilate_these_obs_types variable. This provides the flexibility to have an observation sequence file containing many different observation types and being able to selectively choose what types will be assimilated.
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DART software - Copyright UCAR. This open source software is provided by UCAR, "as is", without charge, subject to all terms of use at http://www.image.ucar.edu/DAReS/DART/DART_download
Contact: | Tim Hoar |
Revision: | $Revision$ |
Source: | $URL$ |
Change Date: | $Date$ |
Change history: | try "svn log" or "svn diff" |