A-SHIELD
Trusted GNSS Authentication and Interference Detection
A-Shield
Resilient Positioning for Critical Applications
A-Shield is ANavS®’s advanced solution for resilient real-time positioning, offering unmatched protection against GNSS interference such as jamming, spoofing, and meaconing. Built upon our tightly coupled sensor fusion engine and extended with AI-driven threat detection, A-Shield ensures trusted navigation – even under criticle conditions.
A-Shield at a Glance
Problems adressed
- GNSS Spoofing Attacks
- GNSS Jamming Events
- Meaconing and Signal Manipulation
- Position Integrity Risks
- Navigation in GNSS-Challenged Environments
Solutions
- Trusted Navigation Outputs
- Real-Time Threat Detection
- Continuous Integrity Monitoring
- Authenticated GNSS Signals
- Fleet-Wide Security Monitoring
Technologies
- Galileo OSNMA Authentication
- AI-Based Threat Classification
- GNSS Signal Analysis
- Multi-Sensor Validation
- Cloud and Fleet Integration
Robust. Intelligent. GNSS Resilience by Design
A-Shield was designed for industries where positioning integrity is critical.
Applications
Autonomous Systems
- UxS Navigation
- Robotics
- Autonomous Vehicles
Railways
- Train Localization
- Infrastructure Monitoring
- Maintenance Vehicles
Maritime
- Vessel Navigation
- Port Operations
Critical Infrastructure
- Defense
- Emergency Services
- Mobile Critical Assets
Key Features
- Multi-layer GNSS protection against spoofing, jamming, and meaconing
- Tightly coupled GNSS/IMU/Odometry sensor fusion
- SLAM/visual Navigation for redundant localization
- Resilient map-based navigation using landmark and environmental feature correlation
- Galileo OSNMA authentication for verified satellite signals
- AI-enhanced threat detection with Recurrent Neural Networks (RNN)
- Navigation with protection levels and confidence indicators
- Robust hardware – optimized for high-reliability environments
System Architecture
- Sensor Fusion Engine: GNSS/INS/Odometry
- AI Module: Neural network for threat classification
- OSNMA Handler: Galileo authentication verification
- Web Interface: Configuration, visualization, remote access
- Cloud Backend (A-Hub): Postprocessing, integrity logging, fleet monitoring
GNSS Spoofing
Impact
- Manipulated satellite signals can cause incorrect positioning.
Solution
- AI-powered spoofing detection and GNSS authentication.
Benefit
- Trusted navigation outputs for safety-critical operations.
GNSS Jamming
Impact
- Interference can block GNSS reception and disrupt positioning.
Solution
- Real-time monitoring and classification of interference events.
Benefit
- Improved operational continuity and situational awareness.
Meaconing
Impact
- Replayed GNSS signals can mislead receivers with seemingly valid positioning data.
Solution
- Recognition of replayed GNSS signals through signal consistency checks and authentication mechanisms.
Benefit
- Protection against deceptive positioning attacks and increased navigation reliability.
Position Integrity Risks
Impact
- Users cannot always determine whether positioning data can be trusted.
Solution
- Continuous integrity monitoring and confidence assessment of positioning information.
Benefit
- Reliable decision-making based on verified navigation data.
Position Integrity Risks
Impact
- Users cannot always determine whether positioning data can be trusted.
Solution
- Continuous integrity monitoring and confidence assessment of positioning information.
Benefit
- Reliable decision-making based on verified navigation data.
Autonomous Navigation Risks
Impact
- Autonomous systems depend on accurate and trustworthy localization for safe operation.
Solution
- Trusted localization through GNSS authentication, interference detection and sensor fusion.
Benefit
- Increased safety and resilience for autonomous vehicles, robotics and UxS platforms.
Railway Safety Requirements
Impact
- Railway applications require highly reliable positioning and integrity monitoring in safety-relevant environments.
Solution
- Multi-layer GNSS protection combined with resilient localization and integrity verification.
Benefit
- Enhanced operational safety and support for compliance-oriented railway deployments.
A-Shield combines multiple layers of resilience (excerpt):
Layer 1 – Classical Interference Detection
- AGC analysis, C/N0 monitoring, Hatch filter
- OSNMA authentication (Galileo)
- Carrier-phase and cross-band analysis
Related Products:
Layer 2 – AI-Based Interference Classification
- RNN trained with real-world data (e.g., from Jammertest 2024)
- Multi-label classification of signal threats per GNSS band
- Deep neural networks fuse GNSS, IMU, and RF signal metrics
Related Products:
Layer 3 – Redundant Sensor Fusion
- Visual odometry, LiDAR SLAM or Camera SLAM
- Radio navigation or landmark-based fallback localization
Related Products:
These are integrated in the ANavS® Sensor Fusion Framework, which guarantees real-time, high-precision positioning with output integrity values.
Protection of Critical Navigation Applications
GNSS Spoofing Attack
A malicious transmitter attempts to manipulate the reported vehicle position.
How A-Shield protects:
- Detects anomalies
- Verifies signal authenticity
- Flags integrity risks
- Generates alerts
GNSS Jamming Event
Satellite signals become unavailable due to interference.
How A-Shield protects:
- Detects interference
- Classifies the event
- Monitors signal degradation
- Supports resilient navigation modes
Meaconing Attack
Previously recorded GNSS signals are replayed to deceive the receiver.
How A-Shield protects:
- dentifies signal inconsistencies
- Validates navigation messages
- Triggers integrity warnings
Our features - Your advantage
Shaping the future of positioning – with customized solutions for every application.
Technology Innovator
The A-ROX systems have the highest level of precision thanks to the use of the most advanced state-of-the-art technologies:
HAS, OSNMA, latest GNSS receivers, jam detection, GLONASS can be switched off.
Easy system
Integration
The system is compatible with competitors' software with minimum effort so that everything functions as a standardised system. Standardised interfaces are integrated to ensure seamless communication: LAN, WIFI, LTE, CAN, CAN-FD, USB
Web-App
State-of-the-art web-based user interface/APP for configuration, test control and simplified fleet management through remote access, post-processing and remote access for support cases.
Breakthrough Pricing
Most attractive value for money with a performance that competes with the top manufacturers.
Minimal Warm-up time
The warm-up time is only 1-2 minutes and no dynamic running-in procedure is required. Automatic recognition of the heading immediately after starting the vehicle.
ACOM Data Stream
The ACOM data stream is compatible with the NCOM data stream and can be connected directly to the OxTS toolchain without changing the toolchain.
ROS 2
ROS-2 simplifies the integration of real-time data.
HAS Technology
(Galileo's High Accuracy Service)
Galileo's HAS technology makes it possible to achieve PPP free of charge by sending correction data directly via the Galileo satellites. This technology significantly improves the accuracy of GNSS systems and is particularly useful for applications that require high precision.
OSNMA (Open Service Navigation Message Authentification)
OSNMA is a technology that is already integrated in the ANavS products and is used for the algorithm to ensure the authenticity of navigation data. It is a security function to ensure that navigation data is not manipulated or spoofed.
Made in Germany
Development, production, calibration, support and repair service in Germany.
Note: Some of the features integrated into A-Shield, including AI-based spoofing detection, were developed and validated as part of the EU-funded DREAM project.
Quick overview
Products
Equipped for every situation with the need of high-precise positioning & navigation: AI-ROX, A-ROX, G-ROX, MSRTK, Snow Monitoring and M.2 SMART Card.
R&D Projects
Our R&D team is constantly working on researching, developing and implementing new technologies to master the challenges of tomorrow.
Publications
Our publications are varied, provide well-founded findings and present innovative solutions: Journal and Conference papers, Patents and Theses