In this paper presents a method of testing performance verification for anti-spoofing that given error to orbital constellation information in navigation message among these anti-spoofing signals. In the GPS L1 signal structure based on GNSS simulators, errors are applied to orbital information, such as inclination angle, Eccentricity, Square root of semi-major axis, to present anti-spoofing test method. In addition, I present the test result.

Keywords: GPS, spoofing, anti-spoofing