GNSS spoofing is a form of interference in which satellite signals mislead a receiver into calculating incorrect position fix, velocity, or time.

Instead of blocking signals like jamming, spoofing replaces them with fake RF waveforms that appear authentic, causing the receiver to compute incorrect position, velocity, or time.

These are most often intentional, designed to mislead navigation or timing systems without triggering obvious alarms. In some cases, spoofing can also occur unintentionally, for example when signals leak from a local GPS repeater or test setup, resulting in incorrect positioning or timing data.

Because spoofed signals can closely resemble real satellite signals, GNSS spoofing is particularly dangerous for:

• Autonomous systems
• Safety-critical operations
• GNSS-based timing infrastructure

In these environments, undetected errors can lead to serious operational or safety consequences.

Anti jamming GNSS systems are advanced solutions designed to detect, suppress, and mitigate intentional or unintentional interference, ensuring reliable positioning, navigation, and timing even in highly contested environments. As GNSS disruptions become more frequent worldwide, these technologies have shifted to a critical component across defense, aviation, maritime, and autonomous systems.

GNSS Anti-Jamming Navigation Kit

The GNSS Anti-Jamming Navigation Kit is a fully integrated high-performance solution designed to deliver reliable positioning, navigation and timing (PNT) in complex electromagnetic environments. The system consists of three core components: a multi-channel array antenna, an advanced anti-jamming processing unit, and a multi-constellation GNSS positioning module. Together, these elements enable continuous and accurate navigation even under strong interference conditions.

The array antenna receives signals across eight channels covering the B1I, B1C, L1 C/A, E1 and G1 frequency bands. It supports simultaneous suppression of up to seven independent interference sources while maintaining GNSS signal reception. The system is capable of handling a wide range of interference types, including narrowband, broadband, pulsed, swept-frequency and combined interference, ensuring robust performance in contested electromagnetic environments.

The anti-jamming unit employs a sophisticated multi-domain processing algorithm that integrates polarization, spatial, temporal and frequency-domain techniques. By fusing these multidimensional characteristics, the system achieves effective interference suppression without compromising positioning accuracy. The GNSS positioning unit supports multi-constellation and multi-frequency signal reception, decoding and processing, providing high sensitivity and high-precision positioning results. The complete kit is engineered for stable operation in dynamic environments and can be seamlessly integrated into various platforms that require reliable PNT information under challenging conditions.

GNSS spoofing may sound technical, but its consequences can be severe and often go unnoticed until it is too late.

• Route deviations in aviation and maritime operations, increasing safety risks and regulatory non-compliance.
• Navigation errors in autonomous robots, drones, and mobile systems operating in urban environments, potentially leading to unsafe behaviour, collisions, or mission failure.
• Timing drift in telecom and financial systems, where even seconds of error can trigger transaction failures or service outages costing thousands of euros.

With anti-spoofing technology built directly into the receiver, systems can:

• Detect and reject GNSS signals.
• Maintain secure and reliable positioning and timing.
• Continue operating safely; even in contested or manipulated GNSS environments.

The detailed configuration of the HT-GGGB008NW GNSS Anti-Jamming Navigation Kit is shown below.

The HT-GGGB008NW GNSS Anti-Jamming Navigation Kit measures:

150 mm × 150 mm × 35 mm (L × W × H)

Standard enclosure color: Signal White.
Custom colors are available upon request.

Figure 2. Mechanical Dimensions (Unit: mm)

The power/data connector is J30J-21ZK.

• Multi-Constellation GNSS Support
• Multi-Frequency Anti-Jamming Capability
• Simultaneous Suppression of Up to 7 Interference Sources
• Advanced Multi-Domain Processing: Polarization, Spatial, Temporal & Frequency Domains
• Effective Against Narrowband and Broadband Interference
• Supports Pulsed and Swept-Frequency Interference Suppression
• High-Accuracy GNSS Positioning
• Fast Re-acquisition After Signal Loss
• High-Dynamic Navigation Performance
• Real-Time PNT (Position, Navigation and Timing) Output
• Compact and Lightweight Design
• Wide Operating Temperature Range: −40°C to +85°C
• Wide-Range Power Input: 9–32 V DC

The module is suitable for integration into platforms requiring reliable GNSS positioning and navigation in complex electromagnetic environments, including:

• Unmanned aerial systems (UAS)
• Autonomous platforms
• Ground vehicles
• Marine platforms
• Navigation and positioning equipment
• High-dynamic mobile platforms
• GNSS-denied or GNSS-contested environments