A system and method is provided for enhancing the coverage and capabilities of Global Navigation Satellite Systems (GNSS) using signal emitters. The signal emitters generate and emit GNSS Radio Frequency (RF) signals that may possess varying sets of information. In some situations, the information may include relative pseudo-random code phases and Doppler frequencies that correspond to the known location of the signal emitter or other locations. In some situations, the GNSS satellite constellation time, and the GNSS satellites that may be visible at a known location were the authentic GNSS signals not obscured or at another location.