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CALPUFF and Postprocessors

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When CALPOST is directed to perform visibility calculations, most of the preceding options remain valid<br />

<strong>and</strong> determine how the computed extinction coefficients are averaged <strong>and</strong> reported. Additional options<br />

are provided to configure how the extinction coefficients are computed:<br />

- Option to select which modeled species (sulfate, nitrate, fine/coarse particulate matter) are<br />

included in the extinction coefficient.<br />

- Option to include background extinction when forming ranked tabulations, top-50 tabulations,<br />

or exceedance tabulations.<br />

- Option to specify the extinction efficiency for each modeled species.<br />

- User-selected method for obtaining the background extinction coefficients (non-speciated<br />

extinction coefficient, monthly speciated extinction coefficients, measured hourly extinction<br />

coefficients)<br />

Whenever visibility processing is selected, the peak daily percent change in extinction <strong>and</strong> the<br />

corresponding change in deciview are always tabulated <strong>and</strong> reported in addition to the tables <strong>and</strong> plotfiles<br />

selected to characterize the extinction coefficient results.<br />

Table G-20 lists the default name of each input <strong>and</strong> output file associated with CALPOST. The plot-files<br />

are named automatically, with the user able to specify a pathname <strong>and</strong> character string to make the file<br />

names unique. The name <strong>and</strong> full path of each file (except one) is assigned in the control file. The<br />

exception, the control filename itself, is assigned on the comm<strong>and</strong> line. For example, on a DOS system,<br />

CALPOST d:\<strong>CALPUFF</strong>\CALPOST.INP<br />

will execute the CALPOST code, <strong>and</strong> read the input <strong>and</strong> output filenames for the current run from the<br />

control file CALPOST.INP in the directory d:\<strong>CALPUFF</strong>. If the control filename is not specified on the<br />

comm<strong>and</strong> line, the default control filename (i.e., CALPOST.INP in the current working directory) will be<br />

used. The total number of characters in the path <strong>and</strong> filename can be up to 70 characters.<br />

The utility routine that delivers a comm<strong>and</strong> line argument is system dependent. The function that<br />

provides the system clock time <strong>and</strong> system CPU time is also system or compiler-specific. All systemdependent<br />

or compiler-specific routines in CALPOST are isolated into a file called DATETM.xxx, where<br />

the file extension (.xxx) indicates the system for which the code is designed. For example, DATETM.HP<br />

contains code for Hewlett-Packard7 Unix systems, DATETM.SUN is for Sun7 Unix systems,<br />

DATETM.LAH is for Lahey7 FORTRAN-compiled PC-applications, <strong>and</strong> DATETM.MS is for<br />

Microsoft7 FORTRAN-compiled PC applications. By appending the correct system-dependent<br />

DATETM file onto the main CALPOST code, the code should run without any modifications.<br />

MAR 2006 -- PostProc<br />

G-56

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