Abstract

Septentrio mosaic-T is a highly reliable timing hub designed for critical infrastructure. It provides a stable time reference even in complex electromagnetic environments, leveraging <1 ns synchronization accuracy and AIM+ anti-jamming and anti-spoofing technology. With its industrial-grade design supporting all-constellation multi-frequency tracking, it is easy to integrate into systems such as communications, power grids, and transportation, building a precise and reliable spatiotemporal foundation for intelligent and resilient infrastructure.

AI Q&A

How does mosaic‑T maintain uninterrupted time synchronization under strong interference?

Based on JammerTest field measurements, Septentrio’s AIM+ technology enables real-time detection and mitigation of various interference signals. Even in extreme environments where interference signal strength is 10 million times higher than that of GNSS signals, mosaic‑T can still maintain signal tracking and time calculation, ensuring continuous and stable PPS and time output.

What hazards do GNSS spoofing attacks pose to timing systems, and how to protect against them?

Spoofing attacks can cause receivers to output incorrect time information, which may further lead to system disorder, data desynchronization, and even service interruption. mosaic‑T is equipped with multi-layer protection mechanisms including multi-frequency redundant tracking, OSNMA signal authentication, and AIM+ anomaly detection. These mechanisms can identify and flag spoofing signals in real time, preventing time data from being tampered with.

What improvements can the AtomiChron service bring to the system?

Through its globally distributed calibration network and cloud-based algorithms, AtomiChron provides mosaic‑T with high-precision time correction directly traceable to UTC. It eliminates errors such as satellite clock offset and ionospheric delay, achieving global synchronization accuracy of better than 1 ns regardless of geographical location.

Is mosaic‑T suitable for long-term operation in harsh outdoor environments?

Yes. Designed for industrial-grade applications, mosaic‑T features an operating temperature range of -40°C to +85°C and has passed MIL‑STD‑810H vibration and shock tests. It is ideal for deployment in harsh environments such as communication towers, substations, and field monitoring stations.

Septentrio, a trusted provider of precise and reliable GNSS timing modules for critical infrastructure

For 25 years, Septentrio has been designing and manufacturing world-renowned GNSS timing receivers for critical infrastructure and leading industry organizations. The Septentrio mosaic-T timing module delivers nanosecond-level synchronization accuracy and is trusted by companies such as Meinberg, Viavi and Saab. Equipped with built-in AIM+ technology, it defends against intentional and unintentional GNSS jamming and spoofing, ensuring maximum system uptime even in challenging or harsh conditions. Regular participation in field jamming and spoofing test events, such as Norway’s JammerTest, ensures that Septentrio receivers remain at the forefront of resilient innovation. The next-generation mosaic T module continues this legacy, offering high precision and exceptional resilience in an ultra-compact form factor.

Why Critical Infrastructure Requires Timing Solutions with Superior Resilience (Anti-Jamming/Anti-Spoofing) and High Precision？

We live in an era defined by time. Every timestamp of financial transactions, every signal synchronization of 5G base stations, and every precise scheduling of aircraft depends on nanosecond-level time accuracy. However, this invisible pillar is facing unprecedented threats today. In the current era of escalating GNSS interference, time synchronization modules are essential to ensure the continuous and uninterrupted operation of critical infrastructure such as data centers, telecommunications networks, financial institutions, and satellite communication stations. Precise time synchronization is the cornerstone of today’s interconnected world, guaranteeing the smooth operation of telecom networks, data centers, and financial systems. Without accurate timing, our digital infrastructure would quickly falter.

Core Advantages of the Septentrio mosaic T GNSS Receiver

High-Precision Timing and Professional Timing Interfaces

Integrated dedicated timing features and input interfaces to support time and clock synchronization

All-in-view satellite tracking capability with multi-constellation and multi-frequency reception

Industry-leading timing accuracy and reliability to ensure secure and precise timing

Equipped with AIM+ advanced anti-jamming and anti-spoofing technology, featuring unique interference monitoring and mitigation capabilities

Built-in advanced GNSS+ algorithms for robust all-weather operation

Industry-leading power consumption metrics with ultra-low power characteristics

Easy-to-integrate module optimized for automated assembly processes

Full-Frequency Multi-System Reception and Robust Anti-Interference Design

Hardware channel design supports full-frequency band coverage, including GPS L1/L2/L5, GLONASS L1/L2/L3, full BDS frequency bands, Galileo E1/E5/E6, QZSS, NavIC, SBAS, and L-band

GNSS+ technology suite includes:

AIM+ Premium: Industry-leading anti-jamming and anti-spoofing technology

APME+: Multipath mitigation

LOCK+: Stable tracking under mechanical vibration

IONO+: Ionospheric interference resistance

RAIM+: Receiver Autonomous Integrity Monitoring

System-Level Reliability and Environmental Adaptability

Complies with MIL-STD-810G vibration standards, suitable for harsh industrial and outdoor environments

Operating temperature range: -40°C to +85°C

Supports wide-range antenna preamplification (15–50 dB) and short-circuit protection

Typical power consumption is only 0.6 W with a maximum power consumption of 1.1 W, ideal for long-term continuous operation

Integration Advantages of mosaic-T in Critical Infrastructure

High-Precision Timing and Multi-Layer Signal Protection for Absolute Time Reference Reliability

As a professional timing-oriented GNSS receiver module, mosaic-T’s core value lies in providing highly trusted and highly available time synchronization services for critical infrastructure. In time-sensitive fields such as 5G communication base stations, power grid synchronization systems, and financial transaction networks, its standard PPS accuracy reaches 5 ns, which can be further improved to <1 ns when combined with the Fugro AtomiChron service, meeting the most stringent synchronization requirements. Meanwhile, the module’s built-in AIM+ Premium anti-jamming and anti-spoofing technology maintains stable signal reception even in complex electromagnetic environments and under malicious attack scenarios, ensuring that the time source remains untampered and uninterrupted, thus delivering a continuously reliable time reference for system operation.

Full-Constellation Full-Frequency Reception and Industrial-Grade Design for Adaptability to Complex Deployment Environments and Long-Term Operation

mosaic-T supports full-constellation and full-frequency GNSS signal tracking, covering GPS, GLONASS, BDS, Galileo, QZSS, NavIC, and SBAS augmentation systems. It provides redundant signal sources, significantly improving timing availability in areas with severe signal occlusion or reflection, such as urban canyons, mountainous regions, and substations. Adopting an industrial-grade package, the module features an operating temperature range of -40°C to +85°C and complies with MIL-STD-810G vibration standards, making it suitable for continuous 7×24-hour operation in outdoor extreme climates and mechanical vibration environments such as communication towers, power grid nodes, and transportation hubs. With a typical power consumption of only 0.6 W, it supports wide-voltage input and antenna short-circuit protection.

Rich Interfaces, Complete Protocols, and Mature Ecosystem to Minimize System Integration and O&M Costs

mosaic-T offers 4×UART, Ethernet, USB, SDIO, and dedicated clock/frequency synchronization input interfaces, supporting multiple protocols including NMEA, SBF, NTP, and PTP for seamless integration with various communication devices, industrial controllers, and time servers. The module adopts an SMT surface-mount package with dimensions of only 31×31×4 mm, suitable for efficient assembly on automated production lines. The accompanying RxTools software suite supports remote configuration, data logging, and diagnostic analysis. Combined with free lifetime firmware upgrade services, it significantly reduces post-deployment O&M complexity and long-term maintenance costs, helping infrastructure systems achieve rapid integration, intelligent management, and sustainable upgrading.

mosaic-T as a Precise Spatiotemporal Foundation for Critical Infrastructure

Becoming a Trusted Time Hub to Support the Construction of National-Level High-Precision Time Networks

As the requirements for time synchronization accuracy and reliability in systems such as 5G-Advanced, 6G communications, smart grids, and digital finance continue to rise, mosaic‑T, with its AtomiChron® synchronization accuracy of <1 ns and multi-constellation NMA/OSNMA signal authentication capabilities, will become a key component in building national-level trusted time distribution networks. It can not only serve as a ground-based time source but also integrate with technologies such as low-Earth orbit (LEO) satellite augmentation and optical fiber time transfer to form a space-air-ground integrated resilient timing system. This system provides a jam-resistant, spoofing-proof, and traceable unified time reference for critical infrastructure, supporting the reliable operation of future smart cities, industrial internet, and national timing systems.

Serving as an Intelligent Resilient Node to Enhance the Self-Adaptive and Collaborative Capabilities of Infrastructure Systems

Against the backdrop of increasingly frequent complex electromagnetic environments and extreme weather conditions, critical infrastructure systems need to be equipped with environmental sensing, threat identification, and autonomous adaptation capabilities. The AIM+ Premium real-time interference monitoring and mitigation mechanism integrated in mosaic‑T can dynamically identify and counter GNSS jamming and spoofing attacks. Combined with its full-frequency multi-system redundant tracking and IONO+ ionospheric interference resistance technology, it enables infrastructure systems to maintain time synchronization and basic positioning functions even when signals are abnormal. By integrating with edge computing and AI analysis platforms, mosaic‑T can serve as a spatiotemporal sensing node for intelligent early warning and collaborative decision-making systems, enhancing the coordinated recovery capabilities of power grids, transportation, and communication systems in emergency scenarios.

Acting as a System Integration and Empowerment Platform to Drive the Construction of Multi-Modal Sensing and Unified Spatiotemporal Foundations

Future critical infrastructure will evolve toward multi-source sensing, data fusion, and service linkage. In addition to providing high-precision time, mosaic‑T can output multi-dimensional spatiotemporal data such as position, velocity, and attitude (RAIM+). Its rich interfaces (Ethernet, UART, USB, SDIO) and protocol support (NTP/PTP, SBF, NMEA) make it easy to interface with heterogeneous devices such as IoT sensors, vision systems, radars, and inertial navigation systems, facilitating the construction of multi-modal sensing networks based on a unified spatiotemporal reference. On this basis, mosaic‑T can provide stable, trusted, and interoperable spatiotemporal data foundations for emerging applications such as cooperative scheduling of autonomous vehicles, UAV inspection fleets, distributed energy grid synchronization, and cross-domain disaster response systems, driving the evolution of critical infrastructure toward intelligence, networking, and service orientation.