Patent ID: 11860283
Assignee: GE AVIATION SYSTEMS LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. An apparatus for detecting the spoofing of a signal from a satellite in orbit to an aircraft, the apparatus comprising:
a receiver located on the aircraft configured to receive an apparent satellite signal and capable of compensating for weather conditions;
a database configured to store data values including an expected power level and an expected waveform;
a computer configured to:
determine at least two characteristic signatures of the apparent satellite signal including a power level of the received apparent satellite signal and a waveform generated by hardware or software of a source of the apparent satellite signal;
compare the power level with the expected power level of a signal received from a satellite in orbit to define a first difference value;
compare the waveform with the expected waveform of the signal received from the satellite in orbit to define a second difference value; and
indicate that the apparent satellite signal is a spoofed satellite signal when at least one of the first or second difference value is outside a predetermined tolerance value.