The OS³ (Open Source Satellite Simulator) model was ported to INET 2.1+ and is available on github. If you want to model satellite based communication, you will need accurate satellite mobility model.

OS³, the Open Source Satellite Simulator, was developed as a framework for simulating various kinds of satellite-based communication, based on OMNeT++. The aim was to create a platform that makes evaluating satellite communication protocols as easy as possible. OS³ is also be able to automatically import real satellite tracks and weather data to simulate conditions at a certain point in the past or in the future, and offer powerful visualization. 

Visit the GitHub repo. Note that the software's homepage still contains an older version of the model which is not compatible with the latest INET version.