Model Operation |
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Requirements
A trajectory or concentration simulation only requires one file called CONTROL, which defines various model parameters and other input and output files. An optional file called SETUP.CFG may be present to define more advanced simulation features. The Graphical User Interface (GUI) provides a user-friendly way to create these files, set any other command line options that some of the post-processing graphics programs may require, and run HYSPLIT and associated programs. Alternatively, the CONTROL and SETUP.CFG files can be created with any text editor, such as Notepad, and HYSPLIT and its associated programs can be run from the DOS command line.Starting from the Tcl/Tk GUI
After a successful install, the PC desktop should contain a HYSPLIT shortcut
with the following properties:Target: \hysplit4\guicode\hysplit4.tcl
Start in: \hysplit4\working
The HYSPLIT “Start in” directory contains sample CONTROL files that can be used for initial guidance to set up more complex simulations. These can be loaded into the GUI from the Retrieve menu tab under the Trajectory Setup or Concentration Setup menus. Examples include:
sample_conc - concentration simulation example from users guide
sample_traj - trajectory simulation example from users guide
back_conc - backward dispersion simulation for concentration
back_traj - backward trajectory simulation
The following example shows how to run the sample trajectory from the GUI (more details will be given in Section III):
| Trajectory | - accessed from the main HYSPLIT menu |
| Trajectory Setup | |
| Retrieve | - retrieves the sample.traj file |
| Save | - saves any changes to the configuration |
| Trajectory | |
| Run Standard Model | |
| Trajectory | |
| Trajectory Display | - sets the display options |
| Execute Display | - show the results as a PostScript file |
Starting from the command line
The following example shows how to run the sample trajectory from the DOS command window:| cd \hysplit4\working | - change to the “start in” directory |
| copy sample_traj control | - create the control file |
| ..\exec\hymodelt | - runs the trajectory model |
| ..\exec\trajplot tdump | - creates the Postscript graphic |
| trajplot.ps | - should open Ghostview |
For command line help on the trajectory program:
| ..\exec\trajplot | - without any command line options |
To run the trajectory model from a customized control file:
| ..\exec\hymodelt traj | - opens file CONTROL.traj |
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