Navigation, redefined

NAVION TERRA

Resilient visual-inertial and terrain-referenced navigation for unmanned vehicles.

GNSS-independentAnti-jammingAnti-spoofing

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01 / Mission

Built for GNSS-denied environments.

When GNSS becomes unavailable or untrustworthy, Navion Terra continues navigating. It fuses inertial, visual, and terrain-referenced information to maintain a resilient navigation solution with a transparent solution-confidence estimate.

GNSS resilience

Preserves continuous navigation when GNSS is jammed, spoofed, unavailable, or untrusted by relying on fused inertial, visual, and terrain-referenced navigation.

Terrain-referenced navigation

Provides terrain-referenced absolute position corrections without depending on visible-light imagery, supporting navigation beneath cloud cover, at night, and in very low-light conditions.

Visual navigation

Uses onboard vision for odometry and satellite-scene matching across a wide operational altitude envelope.

02 / System architecture

Multiple references.
One trusted solution.

Navion Terra continuously evaluates, weights, and fuses available navigation references according to their integrity, availability, and confidence.

INS

INS / IMU

High-rate inertial propagation using calibrated accelerometer and gyroscope measurements.

GNSS

Global position and timing reference when available and trustworthy.

VIO

Visual odometry / VIO

Camera and inertial motion estimation used to constrain drift through tracked visual features.

NAVION TERRAFusion engine

TRN

Terrain reference

Matches radar-altimeter terrain profiles against elevation data for absolute position correction.

SCN

Scene matching

Georeferenced satellite-image matching for absolute position correction without trusted GNSS.

INT

Integrity monitoring

Monitors source health to identify, deweight, or reject anomalous references before fusion.

Fused outputNavigation Solution

01Position02Velocity03Attitude04Solution confidence05Source health

Solution integrity / 01

Solution confidence

Communicates the expected reliability of every navigation solution using covariance-based uncertainty estimates for position, velocity, and attitude.

Solution integrity / 02

Source health

Continuously reports the availability, consistency, and trust level of each navigation reference, including references that are active, deweighted, or rejected.

03 / GNSS-denied continuity

When GNSS can no longer be trusted.

Navion Terra detects GNSS degradation, limits the influence of unreliable measurements, and continues navigating with fused inertial, visual, and terrain-referenced information.

Conventional architecture

GNSS-dependent system

Navigation lost

GNSS nominalSpoofing beginsGNSS deniedExtended denial

GNSS trustAccepted → Lost

INS errorDrift increasing

Position errorUnbounded

Spoofed position is followed; after denial, unaided INS drift accumulates.

Resilient architecture

Navion Terra

Navigation maintained

GNSS nominalSpoofing beginsGNSS deniedExtended denial

Anomaly scoreRising

GNSS weightDeweighted

Fused errorConstrained

INS propagation continues while visual and terrain references constrain drift.

Same environment. Different outcome.

04 / Capability comparison

Built for navigation when GNSS can no longer be trusted.

Navion Terra combines inertial, visual, DSMAC and TERCOM-style terrain-referenced navigation with explicit integrity logic, allowing the system to degrade intelligently instead of depending on a single positioning source.

System	GNSS spoofing detection	GNSS-denied operation	Night + GNSS-denied	Above-cloud + GNSS-denied	Rain + GNSS-denied	Absolute position in GNSS-denied	High-rise urban canyon
Navion TerraINS + visual + DSMAC + TERCOM with integrity-managed fallback	✓Cross-checks GNSS against inertial, visual and map-relative sources	✓Designed for denied and degraded navigation modes	✓TERCOM and inertial aiding do not depend on daylight	✓Terrain-referenced aiding can continue without optical ground visibility	✓TERCOM preserves operation when visual or LiDAR confidence drops	✓Uses validated scene or terrain references when available	✓Rejects GNSS and shifts to INS, VIO and urban scene matching
GNSS onlySatellite receiver as the sole positioning source	!Receiver dependent; no independent motion or scene cross-check	×	×	×	×	×	×Multipath and signal blockage can corrupt or remove the fix
GNSS / INSGNSS-aided inertial navigation	!Can flag inconsistencies, but GNSS remains the absolute reference	!Dead reckoning continues for a limited time	!Light independent, but drift-limited without external updates	!Can coast inertially; uncertainty grows over time	!Weather independent only while inertial drift is acceptable	×No new absolute fix after GNSS loss	!INS smooths urban GNSS errors, but absolute position still depends on GNSS
GNSS / INS / VIOInertial navigation aided by visual odometry	✓Visual motion can challenge inconsistent GNSS updates	!Works while visual tracking remains valid; drift accumulates with route length	!Depends on illumination, camera type and visible texture	!Cloud scenes can be ambiguous or non-stationary	!Rain can reduce visual feature quality	×VIO is primarily relative without map matching	!Helps in urban canyons, but long routes drift without map matching
GNSS / INS / VIO / DSMACDigital scene matching against satellite imagery	✓Scene match provides an independent absolute cross-check	✓Strong when the referenced ground scene is visible	!Depends on sensor band, image quality and reference data	×Cloud cover blocks the ground scene for optical matching	!Rain can reduce scene clarity and match confidence	✓Absolute correction from georeferenced imagery	✓Urban imagery can provide corrections when the ground scene is visible
GNSS / INS / SLAMLiDAR or visual SLAM-aided navigation	✓SLAM motion can reject inconsistent GNSS behavior	✓Works when the environment supports SLAM tracking	!LiDAR can work at night; visual SLAM depends on light	!Cloud or open-sky scenes may not provide stable landmarks	!Rain can affect cameras and some range sensors	!Absolute only with a georeferenced prior map or known landmarks	!Strong with stable landmarks; absolute position needs a prior map

✓Supported!Condition dependent×Not inherent

Technical notes

DSMAC means Digital Scene Matching: matching onboard imagery against georeferenced satellite or map imagery to obtain an absolute position correction.

Navion Terra's night, above-cloud and rain entries assume its TERCOM/terrain-referenced aiding path is active with suitable terrain reference coverage. Pure visual, LiDAR or optical scene-matching systems can still degrade in darkness, rain or cloud-obscured scenes.

In high-rise urban areas, Navion Terra prioritizes GNSS integrity checks and can shift toward INS, VIO and DSMAC-style urban scene matching.

05 / Capabilities

Confidence beyond the signal.

Detect

Detects GNSS degradation and preserves navigation continuity by deweighting or rejecting unreliable measurements and relying on alternative navigation references.

Cross-check

Compares GNSS continuously against terrain-referenced and visual navigation references.

Adapt

Dynamically weights each navigation reference according to availability, consistency, solution confidence, and source health.

Navigate

Delivers a continuous fused navigation solution with position, velocity, attitude, solution confidence, and source health.

06 / Integration

Mission-ready output.
Platform-ready interfaces.

The fused navigation solution output rate is user-configurable from 100 to 250 Hz. Individual perception and correction algorithms operate according to their own sensor and processing rates.

Developer SDK & API

Build on the navigation core

Integrate custom applications, stream telemetry, access sensor data, and configure Navion Terra for existing autonomy and mission software.

SDKAPINMEAMAVLink

Navigation state: Position / Velocity / Attitude
Solution integrity: Solution Confidence / Source Health
Navigation solution output rate: User-configurable, 100–250 Hz
Peak power draw: 20 W
Board mass: 90 g — excluding enclosure and connectors
Platform interfaces: Ethernet / CAN / UART / USB
Sensor integration: Camera / Radar Altimeter / GNSS / IMU
Output formats: NMEA / MAVLink / Custom SDK

Configurable I/O architecture

One core platform.
Two integration paths.

Communication interfaces, telemetry outputs, data formats, and control channels can be tailored to the customer’s UAV, mission computer, payload system, and software stack—without redesigning the core navigation hardware.

01 / Engineering

Development Kit

A flexible platform for evaluation, integration, and application development.

Develop and validate SDK workflows
Stream telemetry and collect raw sensor data
Adapt interfaces to platform requirements

02 / Deployment

Fly-Ready Kit

A mission-ready configuration prepared for direct UAV integration.

Preconfigured hardware and software
Customer-aligned I/O and telemetry formats
Ready-to-integrate operational setup

07 / Contact

Navigate with confidence.

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