GNSS Spoofing Detection

Identifying GNSS Spoofing

Tractor trailers driving down the highway. One tractor trailer displays how NovAtel's GNSS Spoofing Detection technology keeps it on the road.

What is GNSS Spoofing?

Spoofing is a malicious attempt to alter a user’s global navigation satellite system (GNSS) measurements, making their GNSS position unreliable. To mitigate spoofing, users must be alerted when there is a spoofing attempt. GNSS Resilience and Integrity Technology’s (GRIT) situational awareness techniques include spoofing detection, so users know when a malicious attack is occurring. Combined with GRIT’s additional tools, users can characterize the radio frequencies in the area to get a greater understanding of the threat environment.

There are a number of spoofing attacks that an adversary can deploy against your positioning, navigation and timing (PNT) solution. NovAtel’s algorithms use various detection metrics at multiple stages within the signal processing of the OEM7 receiver to provide a robust overall spoofing detection alert.

While a receiver may be spoofed, the user won’t be fooled by the resulting falsified position, navigation and timing (PNT) measurements. Because of the alert, users have increased situational awareness of when their receiver’s measurements may be untrustworthy.

Features & Benefits


  • Enhanced situational awareness of the local RF environment
  • Alerts users to spoofing attempts, often before the PNT solution is ‘captured’ by the spoofer

Spoofing detection is available as part of the GRIT firmware suite, providing assured PNT and reliable situational awareness.

Read Nobody's Fool Spoofing Detection In A High Precision Receiver
Written by Ali Broumandan, Sandy Kennedy and John Schleppe. Originally published in Inside GNSS July/August 2020.