Be ready to see us at Jammertest 2025, the world’s largest open-air event for testing the resilience of positioning and navigation systems against jamming and spoofing.
From September 15 to 19, our team joined over 400 participants in Bleik and Andøya, Norway, for the world’s largest GNSS jamming and spoofing resilience event. To reach the location, they drove 3,400 kilometers—40 hours of driving across six countries. Now that Jammertest 2025 has concluded, we’re proud to share the significant results of our final test days and how they strengthen trust in SBG Systems.
Key testing highlights
- Multidirectional jamming & spoofing: We evaluated passive and CRPA AntiJamming antennas under challenging, real-world interference.
- Spoofing round two: We conducted a second series of mobile spoofing tests, adjusting configurations for even higher resilience in GNSS-denied environments.
- Additional driving tests: Our team drove near and within jammed zones to push system capabilities further.
- High-latitude gyrocompassing: Norway’s northern location enabled us to trial our new gyrocompassing unit under extreme geographic conditions.
What we collected and learned at Jammertest
This participation is a testament to our ongoing commitment to robust, trustworthy technologies.
Our products already operate reliably in adverse field conditions. The demanding Jammertest setting provides a structured environment for evaluation. Thank to that, we collected several terabytes of data during these tests. This data helps us enhance the resilience of our solutions. It also strengthens the overall robustness of our technology.
We see this as a rigorous technical test but also as a collective achievement for our organization. It highlights unity, preparation, and innovation at every step.
About Jammertest 2025
Jammertest 2025, now in its fourth year, is a unique collaborative initiative hosted by Norwegian authorities such as the Norwegian Public Roads Administration, Communications Authority, Defense Research Establishment, and others.
The event exposes participating technology—including ours—to controlled, real-world signal interference and cybersecurity threats, evaluating how systems behave under conditions like GNSS jamming and spoofing.
It provides an unparalleled environment for field data collection and system validation, all with the aim of reinforcing the security and reliability of essential infrastructure.
Thank you and next steps
We deeply appreciate the support and collaboration from Jammertest, Testnor, Calian, Septentrio, Ublox, and Adrelys. These partnerships enable us to continuously improve our technology.
Stay tuned for our complete post-event report—packed with actionable insights and test data. Follow us for the latest on GNSS, jamming, spoofing, and resilient navigation solutions. If you want to access our full results, sign up below for the upcoming technical report.
Do you have questions?
Welcome to our FAQ section, where we address your most pressing questions about our cutting-edge technology and its applications. Here, you’ll find comprehensive answers regarding product features, installation processes, and best practices to maximize your experience with our products.
Gyrocompassing
What is the definition of gyrocompassing?
Gyrocompassing is the process of determining true north by measuring the Earth’s rotation with high-performance gyroscopes, without relying on external references such as GNSS or magnetic compasses.
A gyrocompassing system (gyrocompass) estimates the orientation of an inertial navigation system (INS) by detecting the Earth’s rotation vector, which has an angular rate of approximately 15.041°/h (7.292115 × 10⁻⁵ rad/s). Because the Earth’s rotation projects differently depending on latitude, the system can compute the direction of geographic (true) north after compensating for gravity and sensor biases.
The accuracy of gyrocompassing depends primarily on:
- Gyroscope bias instability and angle random walk (ARW).
- Accelerometer performance for accurate gravity estimation.
- Latitude, since the horizontal component of Earth’s rotation decreases toward the equator.
- The duration of the alignment process, allowing sensor noise to average out.
- Environmental conditions such as vibration and platform motion.
Unlike a magnetic compass, gyrocompassing provides a heading referenced to true north, making it immune to magnetic disturbances. It is widely used in marine navigation, land surveying, defense systems, autonomous vehicles, and aerospace applications, where accurate heading initialization is required before navigation begins.
For high-performance fiber optic gyroscope (FOG) and MEMS-based INS, gyrocompassing can typically achieve heading accuracies ranging from a few tenths of a degree to a few hundredths of a degree under favorable static conditions, depending on sensor grade and alignment time.
What does jamming and spoofing mean?
Jamming and spoofing are two types of interference that can significantly affect the reliability and accuracy of satellite-based navigation systems like GNSS.
Jamming refers to the intentional disruption of satellite signals by broadcasting interfering signals on the same frequencies used by GNSS systems. This interference can overwhelm or drown out the legitimate satellite signals, rendering GNSS receivers unable to process the information accurately. Jamming is commonly used in military operations to disrupt the navigation capabilities of adversaries, and it can also affect civilian systems, leading to navigation failures and operational challenges.
Spoofing, on the other hand, involves the transmission of counterfeit signals that mimic genuine GNSS signals. These deceptive signals can mislead GNSS receivers into calculating incorrect positions or times. Spoofing can be used to misdirect or misinform navigation systems, potentially causing vehicles or aircraft to veer off course or providing false location data. Unlike jamming, which merely obstructs signal reception, spoofing actively deceives the receiver by presenting false information as legitimate.
Both jamming and spoofing pose significant threats to the integrity of GNSS-dependent systems, necessitating advanced countermeasures and resilient navigation technologies to ensure reliable operation in contested or challenging environments.
