Beginner:
This site provides links to sample movies created with the simulator along
with explanations of exactly is happening.
Intermediate:
Here you can run the simulator with a limited number of required input
parameters.
Expert:
The complete simulator with all available parameters.
Additionally, an information page has
been provided to explain the simulator and the required parameters and a
separate technical paper in pdf format is
available that describes in detail the physics behind the simulator as
well as how to use it.