APPENDIX C. UTILITY PROGRAMS
C.1 CONVERTING INPUT RUNSTREAM FILES ‑ STOLDNEW
The STOLDNEW.EXE program is a file conversion utility that may be used to convert original ISCST model (EPA, 1987a) input files to the proper format for the ISCST2 model (EPA, 1992). With the exception of the source inputs for the dry deposition algorithm, the ISCST2 model inputs generated by STOLDNEW will be compatible with the ISCST3 model.
To run the file conversion utility, type STOLDNEW at the DOS prompt. The program will prompt the user for the name of the original ISCST input file being converted and for the name of the new file to be generated in the ISCST2 format. The program will also generate a file called SUMMARY.OLD that contains a summary of model inputs in the same format as would appear at the beginning of an original ISCST model run.
Even though the STOLDNEW utility should convert most ISCST input files without any difficulty, users are strongly encouraged to check the results of STOLDNEW carefully before using the input file with the ISCST3 model. The purpose of this is primarily to check for rounding of the inputs in the conversion process. Some inputs that may vary over a considerable range, such as the emission rate, are converted using an Fortran G format with a full seven significant digits. However, most inputs are converted using a Fortran F format specifier that uses a fixed number of decimal places. Some rounding is possible on some of these fixed format inputs, depending on how many decimal places were used for inputting the data in the original format.
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