JeLSIM: Java eLearning Simulations

The Solar Geometry Model
The solar geometry model takes input of date, time and location of an observer on the earth and returns information about the location of the sun. The model can work in two modes: as a single shot calculation which is carried out each time an input variable is changed or it can be set so to automatically increment time and will run continuously.

User Input
The model takes the following inputs:

Model Output
The model provides the following outputs.

Four interfaces are included here:

Whilst other interfaces can be created from the same model, simple amendments to the model could also be carried out. For instance, a move to simClasses would enable creation of an applet which allowed users to compare day length in different cities on the same graph.