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3.9.2.5 Sequential Results File for Postprocessing.

     The user may select an option for the ISCST model to generate a file or files of concentration (or deposition) values suitable for postprocessing.  The OU POSTFILE keyword controls this option.  The user may select separate files for  each averaging period and source group combination for which postprocessing may be needed.  For each file requested, the user has the option of specifying whether to use unformatted files suitable for postprocessing or to use a plot format which could allow for inporting the x,y,conc files into a graphics package for plotting.  For the unformatted file option, each file consists of sequential unformatted records of values at each receptor location for every averaging period calculated. For the plot file format option, each file consists of formatted records listing the x‑coordinate, y‑coordinate and concurrent concentration (or deposition) values for each receptor and for all averaging periods calculated.  For certain applications, these files may become quite large, and should only be used when needed, especially when using the plot format.

     The structure of both types of postprocessing file is described in more detail in Appendix F.  Each of the postprocessing files selected by the user is opened explicitly by the model as either an unformatted or a formatted file, depending on the option selected.  The filenames are provided on the input runstream image.  The user may specify the file unit on the POSTFILE card through the optional FUNIT parameter. User‑specified units must be greater than or equal to 20, and are recommended to be less than or equal to 100.  If no file unit is specified, then the file unit is determined internally according to the following formulas:

IPSUNT = 200 + IGRP*10 + IAVE     for short term averages

IAPUNT = 300 + IGRP*10 ‑ 5        for PERIOD averages

where IPSUNT and IAPUNT are the Fortran unit numbers, IGRP is the source group number (the order in which the group is defined in the runstream file), and IAVE is the averaging period number (the order of the averaging period as specified on the CO AVERTIME card).  This formula will not cause any conflict with other file units used by the model for up to 9 source groups and up to 9 short term averaging periods.

3.9.2.6 High Value Summary File for Plotting.

     The user may select an option for the ISCST model to generate a file or files of the highest concentration (or deposition) values at each receptor suitable for importing into a graphics package in order to generate contour plots.  The OU PLOTFILE keyword controls this option.  The user may select separate files for each averaging period, source group and high value combination for which a plot file may be needed.  Each file includes several records with header information identifying the averaging period, source group and high value number of the results, and then a record for each receptor which contains the x and y coordinates for the receptor  location, the appropriate high value at that location, and the averaging period, source group and high value number.

     The structure of the plot file is described in more detail in Appendix F.  Each of the plot files selected by the user is opened explicitly by the model as an formatted file.  The filenames are provided on the input runstream image.  The user may specify the file unit on the PLOTFILE card through the optional FUNIT parameter.  User‑specified units must be greater than or equal to 20, and are recommended to be less than or equal to 100.  If no file unit is specified, then the file unit is determined internally according to the following formulas:

   IPLUNT = (IVAL+3)*100 + IGRP*10 + IAVE  for short term aver.

   IPPUNT = 300 + IGRP*10                  for PERIOD averages

where IPLUNT and IPPUNT are the Fortran unit numbers, IVAL is the high value number (1 for FIRST highest, 2 for SECOND highest, etc.), IGRP is the source group number (the order in which the group is defined in the runstream file), and IAVE is the averaging period number (the order of the averaging period as specified on the CO AVERTIME card).  This formula will not cause any conflict with other file units used by the model for up to 9 source groups and up to 9 short term averaging periods.

 

201 - 202 - 203 - 204 - 205 - 206 - 207 - 208 - 209 - 210 - 211 - 212 - 213 - 214 - 215 - 216 - 217 - 218 - 219 - 220 - 221 - 222 - 223 - 224 - 225 - 226 - 227 - 228 - 229 - 230 - 231 - 232 - 233 - 234 - 235 - 236 - 237 - 238 - 239 - 240 - 241 - 242 - 243 - 244 - 245 - 246 - 247 - 248 - 249 - 250

 

 

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