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Suppliers: GPS Denied Navigation
Advanced Navigation
Advanced Inertial Navigation Systems (INS) for Reliable Navigation in Challenging Operational Environments
Platinum Partner
ANELLO Photonics
Cutting-Edge Inertial Solutions for High-Accuracy Navigation & Positioning in GPS-Denied Environments
Platinum Partner
Honeywell Aerospace
Advanced Solutions for Defense Modernization: Propulsion, Sensors, Communication & Augmented Reality Systems
Platinum Partner
Inertial Labs, a VIAVI Solutions Company
Tactical Grade IMU, GPS/INS, Weapon Orientation Solutions
Platinum Partner
Ground Control
Reliable, Resilient and Secure Satellite Communications & Assured PNT Solutions for Mission-Critical Applications
Gold Partner
UAV Navigation-Grupo Oesía
State-Of-The-Art Flight Control & GNSS-Denied Navigation Technologies for Tactical UAV Platforms
Gold Partner
EMCORE Corporation
High-Performance Fiber Optic, Ring Laser Gyro and MEMS Inertial Sensors & Navigation Systems
Gold Partner
Silicon Sensing
MEMS Inertial Sensors, Gyroscopes & Accelerometers for Inertial Guidance, Control & Stabilization
Gold Partner
Septentrio
Assured PNT Solutions for Mission Critical Military, Defense & Government Applications
Silver Partner
UAV Propulsion Tech
MEMS-based Inertial Navigation Systems for Supporting Tactical Unmanned Operations in GPS-Denied Environments
Silver Partner
Products
GNSS/GPS-Denied Navigation and Positioning Solutions
GPS/GNSS-denied navigation allows military vehicles and autonomous platforms to determine their position and movement in environments where global navigation satellite systems are unavailable, jammed, or spoofed.
These environments are increasingly common in modern combat zones, especially where adversaries deploy electronic warfare measures.
Without reliable satellite signals, unmanned systems require alternative solutions that combine inertial measurement, environmental sensing, mapping, and algorithmic estimation. These solutions are often tailored to the operating domain, land, air, sea, or subsurface, and optimized for resilience, accuracy, and real-time responsiveness.
HGuide o480 inertial/GNSS for drone navigation from Honeywell.
Key GNSS-denied Applications
GNSS-denied capabilities are vital across multiple mission types. The following domains represent the primary defense applications for these technologies:
Unmanned Aerial Vehicles in Contested Airspace
Military UAS (Unmanned Aerial Systems) are often deployed in anti-access/area-denial (A2/AD) zones where GNSS spoofing and jamming are expected. In these missions, UAVs rely on inertial navigation systems, terrain-referenced navigation, visual odometry, and SLAM to maintain flight control, execute precision targeting, or conduct ISR without satellite support.
Applications include long-endurance reconnaissance, tactical mapping, loitering munitions, and drone swarm coordination, all requiring independent navigation resilience.
Ground Robotics for Urban and Subterranean Operations
Urban canyons can cause multi-path distortion or a complete loss of signal. In these settings, Unmanned Ground Vehicles (UGVs) use tactical-grade IMUs, LIDAR sensors, radar, and SLAM algorithms to support:
- Autonomous resupply
- Explosive ordnance disposal (EOD)
- Intelligence gathering
- Forward observation in complex terrain
These platforms must be capable of operating in GPS-denied corridors, underpasses, basements, or confined infrastructure environments.
Subterranean and Tunnel Reconnaissance
Specialized unmanned systems are deployed for subterranean exploration in denied areas, such as tunnel networks, cave complexes, or hardened military structures. These vehicles must navigate without access to GNSS and are equipped with sensor packages for mapping, localization, and structural analysis.
They are used for:
- Border tunnel detection
- Hostile underground facility mapping
- Disaster response in collapsed infrastructure
Underwater and Littoral Navigation
GNSS signals do not penetrate water, making all underwater operations inherently GPS-denied. Unmanned Underwater Vehicles (UUVs) use Doppler velocity logs (DVLs), inertial sensors, bathymetric maps, and acoustic beacons for navigation.
Applications include:
- Mine countermeasures
- Harbor and coastal surveillance
- Seabed infrastructure monitoring
- Covert ISR operations
Tactical Operations and Dismounted Soldier Navigation
Handheld or body-worn navigation tools are essential for troops operating in electronic warfare zones or GNSS-degraded environments. These tools use dead reckoning, magnetometers, and terrain data to guide operators silently and precisely.
Such systems are designed for:
- Special operations forces in denied areas
- Covert ingress/egress routes
- RF-silent navigation
MEMS Inertial Measurement Unit, IMU-H100, for drone, submarine, and autonomous vehicle navigation, by Inertial Labs.
Autonomous Logistics and Resupply
Unmanned logistics vehicles support mission sustainment in GNSS-contested regions. Ground or aerial resupply platforms use preloaded routes, obstacle detection, and terrain-following algorithms to complete deliveries in hostile environments.
Common use cases include:
- Autonomous cargo delivery to front-line units
- Medical supply drops in electronic warfare zones
- Low-profile logistics missions in denied airspace
- Navigation Technologies Supporting GNSS-Denied Operations
GNSS-denied systems integrate multiple sensor modalities and computational methods to achieve accurate navigation. Core technologies include:
- Inertial Navigation Systems (INS): Gyroscopes and accelerometers for dead reckoning
- Magnetometers: Compass-like orientation tools resistant to satellite loss
- Visual Odometry: Motion tracking via optical image analysis, including the use of optical flow sensors for pixel-level motion estimation
- LIDAR and Radar Sensors: Environmental scanning for terrain-relative positioning
- Acoustic Navigation: Used in underwater environments with sonar or DVLs
- SLAM Algorithms: Real-time mapping and localization
- Timing Modules: OCXOs or chip-scale atomic clocks for time synchronization
- Sensor Fusion Frameworks: Combining multiple data sources for accurate localization
Types of GNSS/GPS-Denied Systems
GNSS-denied capabilities vary by mission and platform. Key system types include:
- UAV Navigation Modules: For strike and ISR drones in contested airspace
- UGV SLAM Systems: Designed for robotic ground platforms in complex terrain
- Underwater Navigation Suites: Tailored to UUVs for fully submerged operation
- Wearable Navigation Kits: Compact tools for dismounted troops
- Swarm Coordination Systems: Internal navigation logic for multi-agent autonomous ops
Industry Standards and Defense Specifications
GNSS-denied navigation systems must meet rigorous defense standards to ensure performance and interoperability. Commonly applied standards include:
- MIL-STD-810: Environmental test standards for vibration, temperature, and shock
- MIL-STD-1553 / 1760: Communication protocols for avionics and weapons interfaces
- MIL-STD-461: Electromagnetic compatibility (EMC) requirements
- STANAG 4586: NATO standard for UAV interoperability
- DO-178C / DO-254: Applicable for certified aerospace-grade software and hardware
These standards ensure reliability in extreme operational environments and allow integration with existing command-and-control frameworks.
Comparisons with Traditional GNSS-Based Systems
Traditional navigation systems rely heavily on GNSS constellations such as GPS, GLONASS, Galileo, and BeiDou. While effective in open and stable environments, these systems are vulnerable to:
- Signal jamming or spoofing
- Multipath distortion in urban terrain
- Denial in underground or underwater domains
- Tactical exposure due to RF emissions
GNSS-denied systems mitigate these vulnerabilities through internal sensing, passive data acquisition, and terrain-based localization, offering resilience and independence from space-based infrastructure.
Strategic Importance of GNSS-Denied Navigation
As military forces become more reliant on autonomous and semi-autonomous systems, the ability to operate in GNSS-denied conditions is essential for mission assurance. Adversarial threats to satellite infrastructure and increasing electronic warfare capabilities highlight the strategic need for resilient, modular, and signal-independent navigation systems.
GNSS-denied solutions support operational flexibility, enhance survivability, and ensure mission continuity across domains, land, air, sea, and subsurface.
