Table of Contents - The Atmospheric Studies Group at TRC

Section 8: CALMET Model Files
descriptive text can be inserted within the control file to make it self-documenting. For example, the
definition, allowed values, units, and default value of each input variable can be included within the
control file.
The control file processor searches for pairs of special delimiter characters (!). All text outside the
delimiters is assumed to be user comment information and is echoed back but otherwise ignored by the
input module. Only data within the delimiter characters are processed. The input data consist of a
leading delimiter followed by the variable name, equals sign, input value or values, and a terminating
delimiter (e.g., !XX = 12.5 !). The variable name can be lower or upper case, or a mixture of both (i.e.,
XX, xx, Xx are all equivalent). The variable can be a real, integer or logical array or scalar. The use of
repetition factors for arrays is allowed (e.g., ! XARRAY = 3 * 1.5 ! instead of ! XARRAY = 1.5, 1.5, 1.5
!). Different values must be separated by commas. Spaces within the delimiter pair are ignored.
Exponential notation (E format) for real numbers is allowed. However, the optional plus sign should be
omitted (e.g., enter +1.5E+10 as 1.5E10). The data may be extended over more than one line. The line
being continued must end with a comma. Each leading delimiter must be paired with a terminating
delimiter. All text between the delimiters is assumed to be data, so no user comment information is
allowed to appear within the delimiters. The inclusion in the control file of any variable that is being
assigned its default value is optional.
The control file reader expects that logical variables will be assigned using only a one character
representation (i.e., 'T' or 'F'). Input Groups 7-9 are handled differently (making use of FORTRAN free
reads), because they contain Character*4 input data. The data portion of each record in Input Groups 7-9
must start in Column 9 or greater of the record.
Each CALMET control file input variable is described in Table 8-4. The control file module has a list of
the variable names and array dimensions for each Input Group. Checks are performed to ensure that the
proper variable names are entered by the user, and that no array dimensions are exceeded. Error
messages result if an unrecognized variable name is encountered or too many values are entered for a
variable.
Note that if LLCONF=T, then all x,y coordinates in the CALMET.INP file must be specified on the
chosen Lambert Conformal projection grid, rather than in UTM coordinates.
A standard control file is provided along with the CALMET test case run. It is recommended that a copy
of the standard control file be permanently stored as a backup. Working copies of the control file may be
made and then edited and customized by the user for a particular application.
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