Download the software by rightclicking on SimVLTI
to save the link wherever you want it to be.
Under UNIX give the command:
tar xzvf SimVLTI_0.35.1.tar.gz
If this doesn't work, you may have to use the commands
gunzip SimVLTI_0.35.1.tar.gz
tar xvf SimVLTI_0.35.1.tar
Under Windows or MacOS, expand the compressed tar file with your favourite
tool.
All this creates a subdirectory called VS
Now fire up IDL.
Within IDL, change the working
directory to the VS directory by typing
cd,'/path/to/VS'
Attention, MacOS users have to set the working
directory from the IDL menu. Then type
@start_vs
The GUI should come up
now and you can start playing around or reading some of the help instructions... have fun!