Global navigation satellite system spoofer identification technique based on carrier to noise ratio signatures

A computer-implemented method, the method comprising:

• receiving, via an antenna movable in space, space vehicle (SV) signals that appear to be associated with a plurality of space vehicles of a global navigation satellite system (GNSS), wherein:
• the antenna is configured to be moved in space using a gimbal, and/or the antenna is mounted to a vehicle wherein movement of the vehicle changes a pointing angle of the antenna, and/or wherein the antenna comprises a controlled reception pattern antenna (CRPA) and a beamformer device is used to beam steer one or more survey beams of the controlled reception pattern antenna;
• and
• identifying space vehicle (SV) signals that have similar signal power and/or phase signatures that respectively appear to be associated with at least a first space vehicle and a second space vehicle of the global navigation satellite system (GNSS);
• and
• identifying an existence of a spoofer based at least in part on the identification of space vehicle (SV) signals that have similar signal power and/or phase signatures that respectively appear to be associated with at least the first space vehicle and the second space vehicle of the global navigation satellite system (GNSS).