UK-based GNSS software provider Focal Point Positioning has published results from Jammertest 2025, showing how its patented Supercorrelation technology enables GNSS receivers to detect and track authentic satellite signals under real-world spoofing conditions.
In open-air trials in Andøya, Norway (September 2025), the software demonstrated an ability to suppress spoofed signals and maintain signal integrity, supporting more resilient positioning for safety-critical applications.
The trials were conducted as part of Jammertest, an internationally recognized test campaign hosted by Norwegian authorities to assess GNSS performance under realistic jamming and spoofing conditions.
Focal Point Positioning collected live RF data using a test vehicle equipped with a roof-mounted GNSS antenna and a LabSat 4 recorder, alongside an inertial measurement unit (IMU) and commercial off-the-shelf GNSS receivers. The recorded signals were then replayed into multiple receivers at the company’s Cambridge facility for further analysis.
Laurence Bennett, an algorithm engineer at Focal Point Positioning, explained, “Jammertest was an ideal opportunity to evaluate GNSS performance under realistic compromised conditions and understand how this technology can withstand the effects of spoofing.”
Bennett continued, “We demonstrated how Supercorrelation enables receivers to distinguish between genuine and inauthentic signals, improving resilience without the need for additional, complex hardware.”
Analysis of the results showed a clear performance difference between receivers with and without Supercorrelation processing. During meaconing attacks, where legitimate GNSS signals are rebroadcast to mislead receivers, conventional processing was unable to isolate the authentic line-of-sight satellite signal, which was overwhelmed by stronger, delayed spoofed signals. In these conditions, receivers risk tracking the false signal, potentially compromising positioning integrity.
In contrast, Supercorrelation processing was able to recover and track the authentic signal while significantly reducing the impact of meaconed signals. Supercorrelation uses long, motion-compensated coherent integration to strengthen genuine satellite signals and suppress delayed or inauthentic ones.
As a software-based approach, it can be deployed via firmware upgrade, enabling scalable integration across GNSS-enabled devices.
“As sectors such as automotive, mobile and critical infrastructure become more reliant on GNSS, resilience to this kind of disruption is becoming increasingly important,” added Bennett. “Spoofing and meaconing attacks pose a growing risk to positioning accuracy, particularly in safety-critical applications where compromised signals can have significant operational consequences.”
Focal Point Positioning plans to publish further technical analysis of its Jammertest 2025 results in the coming months, supporting ongoing collaboration with chipset partners.
In related news, Audi A2 e-tron racks up the miles during validation testing
