IDENTIFYING POTENTIALLY MANIPULATED GNSS NAVIGATION DATA AT LEAST PARTIALLY BASED ON GNSS REFERENCE DATA

摘要

It is inter-alia disclosed a method performed by a mobile device (2), said method comprising:- receiving (501) GNSS reference data representing one or more GNSS signals (105-108) observed by a reference receiver (4) at a reference position;- receiving (502) GNSS navigation data;- determining (503), at least partially based on said GNSS reference data and said GNSS navigation data, a position estimate of said reference position;- determining (504), at least partially based on said reference position and said position estimate of said reference position, whether or not said GNSS navigation data are potentially manipulated.