Furuno to test GNSS resilience at Jammertest 2026

Furuno will take part in Jammertest 2026 in Andøya, Norway, from Sept. 14-18, using its new GF-100 Series dual-band GNSS disciplined oscillator to test resilience against jamming and spoofing. The company will also verify Japan’s QZSS “Michibiki” signals under interference conditions as GNSS attacks continue to threaten critical infrastructure worldwide.

Why it matters: - GNSS interference is a growing risk for aviation, maritime transport, telecommunications, finance and power grids. - Furuno is using real-world testing to validate how its receivers maintain stable timing and frequency when GNSS signals are disrupted. - The results are intended to improve future products and support more reliable critical infrastructure.

What happened: - Furuno will participate in Jammertest 2026 in Andøya, Norway, from Sept. 14-18, 2026. - The event is billed as the world’s largest GNSS resilience testing initiative. - Furuno's participation marks a third straight year at Jammertest, following tests in 2024 and 2025. - The company will test the GF-100 Series dual-band GNSS disciplined oscillator, which is scheduled for release in November 2026. - Furuno will also verify QZSS, nicknamed “Michibiki,” under jamming and spoofing conditions on commission from Japan’s Cabinet Office.

The details: - Jammertest evaluates how GNSS receivers perform against radio interference, including jamming and spoofing, in real-world conditions. - The event brings together Norway’s road administration, telecommunications authority, defense research institutions, metrology services, space agencies, mapping authorities and airport operators. - Multiple interference scenarios are provided so participants can expose their receivers to field conditions. - Furuno used the GT-100 timing multi-GNSS receiver module at Jammertest 2024 to assess basic behavior under jamming and spoofing. - Furuno tested an enhanced GT-100 at Jammertest 2025 and verified the company’s resilience algorithms under more complex interference. - The GF-100 Series uses L1/L5 dual-band reception, automatic detection and exclusion of abnormal satellite signals, and GNSS signal authentication. - When jamming or spoofing affects all bands, Proactive Holdover disengages from GNSS and switches to holdover using the built-in oscillator. - The design lets the GF-100 Series continue stable time and frequency output during interference. - Furuno will use Jammertest 2026 data for product improvements. - Furuno engineers will operate the test equipment and collect data for the QZSS verification. - The QZSS tests will assess reception status and interference effects in an outdoor environment under multiple interference scenarios. - Furuno will use the QZSS data to help improve the system’s future reliability. - Products listed for testing include the GF-100 Series and Furuno’s multi-GNSS timing antennas AU-500. - Jamming refers to radio waves that interfere with GNSS signals. - Spoofing refers to maliciously broadcast GNSS-like signals meant to trick receivers into calculating false position or time. - Related information is available in Furuno’s June 29, 2026 announcement, its Sept. 10, 2025 Jammertest notice, and its May 16, 2023 antenna announcement.

Between the lines: - The move underscores how GNSS resilience is shifting from lab simulation to field validation in contested signal environments. - Furuno is positioning the GF-100 Series around defense-in-depth features rather than relying on a single anti-jamming or anti-spoofing measure. - The Cabinet Office-backed QZSS testing suggests official interest in assessing satellite timing reliability under interference.

What's next: - Furuno will run field tests at Jammertest 2026 and analyze how the GF-100 behaves during and after interference. - The company will use the findings to refine future GNSS products. - The GF-100 Series is slated to launch in November 2026.

The bottom line: - Furuno is betting that real-world resilience testing will prove whether GNSS timing gear can stay reliable when interference hits.