A Navigation Spoofing Algorithm Based on Clock Error Fitting

As an all-weather and high-precision Positioning Navigation (PNT) System, Global Navigation Satellite System (GNSS) has a profound impact on people's daily life. Although the spread spectrum communication and other anti-terference methods are adopted, the navigation signal is still vulnerable to interference or tampering because the power of navigation signal is only -160 dBW on the ground. At present, the spoofer can be divided into two types: self-consistent spoofer and meaconing spoofer. Self-consistent spoofer has the advantages of setting flexibly for civil public signals and no transceiver interference, which has attracted widely attention. We propose a spoofing algorithm which is different from the traditional method based on delay filter. This method can obtain continuous error positioning results and lower the positioning (or timing) performance of navigation receiver. It is an effective way of navigation spoofing.