# Objective: When GPS signals are not available (high-Earth orbits, Earth-to-Moon transfers) satellite position estimation is a fundamental requirement for autonomous navigation.
# Techniques: Simulation of satellite dynamics accounting for perturbating effects. Nonlinear estimation techniques (EKF, UKF) for satellite localization [1,2].
# Main features: Based only on angular measurements of celestial bodies. Comparison of different nonlinear estimators