Listen to this content
Furuno will begin providing new firmware for its GNSS receivers for time synchronization, including models GT-100, GT-90 and GT-9001, which adds authentication features (OSNMA/QZNMA) and significantly strengthens anti-jamming and anti-spoofing measures.
In fields that support critical infrastructure such as telecommunications, finance and power, GNSS vulnerabilities have become a major issue. The Furuno team participated in Jammertest 2025, the world’s largest GNSS resilience testing event. Jammertest 2025 took place in Norway, and verified robustness and reliability under real attack conditions to meet the requirements of critical infrastructure.
Features of the new firmware
- Addition of authentication functions (OSNMA/QZNMA): Authentication messages from Galileo (European GNSS) and QZSS (Japan’s Quasi-Zenith Satellite System) confirm the authenticity of navigation messages, strengthening resistance to spoofing attacks.
- Enhanced anti-jamming and anti-spoofing measures: Detect and eliminate various interference signals with high precision, ensuring stable time synchronization.
- Removal of altitude restrictions, enabling use in the stratosphere and similar environments
- Addition of TAI (International Atomic Time) output function
- Support for multiple data formats (RTCM10403.3, RINEX4.1, binary)
Availability
For existing users: Provided as a firmware update.
For new shipments: GT-100, GT-90 and GT-9001 with the new firmware are scheduled to ship beginning in March 2026.
Related product information
Furuno has also launched the GNSS Surge Protector, TVA-05V for GNSS antennas.
This product protects GNSS receivers from surges caused by lightning, further enhancing the stable operation of critical infrastructure.
In Jammertest 2024, challenges were identified using GT-100; in Jammertest 2025, improvements were validated with the upgraded version, confirming the effectiveness of the resilience algorithms under operational conditions.
