Welcome to the home page of the Amateur (Ham) Satellite Predictor AmsatDroid.
This software predicts future passes for amateur radio satellites for a specified location and period of time. It runs on the Android operating system (v 1.5 and above).
We have moved to using a Java implementation of the NORAD SGP4 Simplified Perturbation Model as implemented by Dave Johnson, G4DPZ rather than the "Satellite Education News Tracker". This is an open source project known as predict4java which is in use by the GENSO project, amongst others.
The SGP4 based pass calculation give more accuracy in terms of AOS, LOS, TCA and position. Please read the NEWS for more information.