Abstract: 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.

Abstract: A system and method is provided for monitoring and possibly controlling radio frequency power levels within GNSS signal distribution networks. With respect to GNSS signal distribution networks that re-radiate the GNSS signal, limiting GNSS signals to an intended area is described.

Abstract: A system and method is provided for detecting spurious frequency oscillations within Global Navigation Satellite System (GNSS) signal distribution networks. Power levels of Radio Frequency signals within a GNSS signal distribution network are measured or detected to exceed a threshold and compared to levels known to exceed the GNSS signals level of a properly operating system. A system and method is provided for disabling the conditions enabling spurious frequency oscillations when such conditions are detected.