Assured Positioning, Navigation, and Timing (APNT) refers to the ability to deliver trusted positioning, navigation, and timing data even when satellite-based systems are disrupted, manipulated, or unavailable. As reliance on GNSS continues to grow, positioning can no longer be assumed to work in all conditions. APNT addresses this challenge by enabling systems to maintain continuity, integrity, and operational confidence when signals are degraded or denied.
APNT combines multiple layers of resilience, including robust GNSS reception, interference awareness, jamming and spoofing detection and mitigation, message authentication, inertial and sensor fusion support, secure timing capabilities, and system-level strategies that allow operation to continue during outages.
For autonomous and mission-critical platforms, the challenge is no longer just receiving GNSS signals but ensuring that positioning data remains reliable when those signals are disrupted, degraded, or manipulated. GNSS vulnerabilities, such as jamming, spoofing, and interference, affect systems in different ways:
| Jamming | Spoofing | Interference |
|---|---|---|
| Disrupts signal availability by overpowering or obscuring legitimate satellite signals. | Attempts to mislead the receiver with counterfeit signals or manipulated navigation data. | Introduces unwanted RF energy that reduces performance, stability, or confidence, whether intentional or unintentional. |
Combined, these risks present a real and fundamental challenge for reliable operations. Without a technology shift, positioning is no longer guaranteed. This is why APNT is becoming essential. It moves positioning from a performance metric to a resilience requirement, from single-source dependency to multi-source architectures, and from assumed availability to systems designed for failure and mission continuity.
APNT represents a fundamental advance in how positioning systems are designed:
| Conventional GNSS approach | APNT |
|---|---|
| Accuracy-focused | Resilience-focused |
| Performance-driven design | Continuity-driven design |
| Accuracy as primary goal | Reliability as primary goal |
u-blox is trusted for delivering globally available state-of-the-art GNSS solutions, enabling reliable, high-quality, and scalable positioning across a wide range of industries through efficient, easy-to-integrate products. While high-end APNT systems offer strong resilience in challenging environments, they often come with significant integration complexity, cost, and limited scalability, making them impractical for widespread deployment.
As interference and spoofing become more prevalent, the industry requires a new approach that combines resilience with efficiency and scalability.
Built on a trusted single-chip architecture, the u-blox ZED-R20P delivers on this requirement, providing robust performance against jamming and spoofing while maintaining the power efficiency, integration simplicity, and scalability that define u-blox solutions.
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At the core of this capability is u-blox NavPRISM (Positioning Resilience and Interference Mitigation), a dedicated signal-level engine designed to ensure GNSS positioning remains robust and reliable under RF interference.
NavPRISM focuses specifically on protecting GNSS signals from disruption and deception, enabling systems to maintain positioning even in contested environments.
Modern operational environments are increasingly affected by multi-band jamming and spoofing attacks, making reliable GNSS positioning more challenging.
With NavPRISM, ZED-R20P delivers:
Ensuring positioning remains available even in the presence of active interference.
In defense and mission-critical applications, the greatest risk is not signal loss, but deceptive positioning.
NavPRISM is designed to:
Ensuring systems are not misled by plausible but incorrect positioning data.
NavPRISM integrates Galileo OSNMA to further strengthen signal trust:
Reinforcing confidence in GNSS signals from space.
Not all interference scenarios are the same, effective mitigation requires adaptability.
NavPRISM dynamically:
Ensuring consistent operation without manual intervention.
Modern GNSS performance depends on maintaining access to usable signals, even under degraded conditions.
NavPRISM enhances signal availability through:
Ensuring reliable positioning even when signal conditions are suboptimal.
While NavPRISM ensures signal resilience, trusted positioning also requires protection across the entire system.
The ZED-R20P platform extends security beyond the RF domain through a security-by-design architecture, ensuring that positioning data remains authentic, secure, and protected from tampering.
Ensuring trusted data remains secure across system boundaries.
Ensuring only valid and unaltered data is used by the system.
Protecting the receiver from compromise and misconfiguration.
Ensuring device-level security even in exposed environments.
u-blox brings APNT capabilities to scalable, real-world systems through its R20 platform, combining resilient GNSS reception, signal threat awareness, authentication, and continuity mechanisms.
These capabilities are designed for applications where positioning must remain reliable under disruption, while meeting the constraints of quality, power, integration, and large-scale deployment. As a result, APNT is becoming essential across a range of markets where positioning failure is no longer acceptable.
Drones and UAS represent one of the most demanding and rapidly evolving environments for APNT. These systems depend heavily on positioning data, often operate in RF-challenged or contested conditions, and must meet strict constraints on size, weight, power, and quality while supporting scalable deployment across fleets and platform variants.
In many of these systems, positioning failure directly leads to mission failure.
As drone applications mature, positioning is no longer just a performance parameter. It is increasingly tied to trust, regulation, and operational safety. Key capabilities are becoming part of the system requirement rather than optional features:
This creates a new design challenge. System developers must balance multiple factors while adapting to different mission profiles:
Within the drone ecosystem, requirements vary significantly across platforms. From small UAS where efficiency and quality are critical, to high-speed interceptor drones operating in dynamic conditions, to advanced autonomous systems with higher demands on integrity and system awareness. This diversity makes drones an important driver for scalable APNT solutions.
Defence and security represent one of several environments where positioning reliability is critical, alongside drones, autonomy, and critical infrastructure. Jamming, spoofing, and intentional interference are part of the operational landscape, and positioning systems must be designed to function under these conditions.
In many of these scenarios, positioning failure directly impacts mission execution. Systems must be able to maintain reliable navigation and timing while detecting, resisting, and responding to signal threats in real time.
Key requirements for defence and security applications include:
This creates a fundamentally different design paradigm. Systems cannot rely on signal availability and must instead be built for resilience under disruption.
APNT provides the foundation for this approach. By combining signal awareness, authentication, continuity mechanisms, and secure system design, it enables defense and security systems to maintain mission continuity in environments where reliability cannot be assumed.
APNT represents both a technology and a deployment challenge. Positioning systems need to combine resilience with scalability to operate reliably across real-world environments.
u-blox is enabling this transition through its R20 platform.
