摘要：In an era of increasing threats to all GNSS systems, researchers are exploring ways to detect jamming, spoofing, and other attempts to prevent reliable delivery of PNT information. Authentication of satellite signals is drawing particular attention. This article describes the design and results of SARA, a proposal that received the DLR special prize of the Galileo Masters competition in 2011. SARA is an autonomous receiver-based method for detecting efforts to interfere with GNSS signals, by first characterizing the behavior of user equipment experiencing various kinds of malicious attacks and then detecting these in real time by comparing those observables with normal receiver operation
