> For the complete documentation index, see [llms.txt](https://teravolt.gitbook.io/teravolt/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://teravolt.gitbook.io/teravolt/gps/aeronav-x5/introduction.md).

# Introduction

<figure><img src="/files/x00JiMIO53vOFw4wuLNY" alt="AeroNav-X5 Front" width="563"><figcaption></figcaption></figure>

**Advanced Mitigation Technologies (GNSS+)**

The AeroNav-X5 is built around Septentrio's GNSS+ suite, one of the most comprehensive signal-protection stacks available in a compact GNSS module. It provides active, layered defense against the full range of real-world threats — from deliberate jamming and spoofing to environmental signal degradation.

#### **Anti-Jamming & Anti-Spoofing — AIM+**

AIM+ (Advanced Interference Mitigation) is the core of the module's RF protection capability. It continuously monitors the signal environment and classifies interference in real time, then applies targeted mitigation without disrupting legitimate satellite tracking.

#### **Threat types addressed:**

| Threat              | Description                                                                 |
| ------------------- | --------------------------------------------------------------------------- |
| Narrow-band jammers | Tonal or CW interference targeting specific GNSS frequencies                |
| Wide-band jammers   | Broadband noise designed to overwhelm the entire GNSS band                  |
| Chirp jammers       | Swept-frequency signals — the most common jammer type in the field          |
| Spoofing signals    | Counterfeit satellite signals designed to mislead position or timing output |

**Key capabilities:**

* Real-time interference detection, classification, and suppression
* Anti-spoofing operates at the signal processing level — no external infrastructure required
* Paired with RAIM+ for cross-satellite consistency checks that catch spoofing attempts that pass initial signal-level screening
* OSNMA (Open Service Navigation Message Authentication) support for cryptographic authenticity verification of Galileo signals

> **AIM+ is passive to the host system.** No configuration is required to activate interference protection — it runs continuously in the background and does not affect the standard NMEA/SBF/RTCM output pipeline.

**Integrity Monitoring — RAIM+**

Receiver Autonomous Integrity Monitoring continuously cross-checks position solutions across all tracked satellites. Any satellite whose measurement is inconsistent with the ensemble is flagged and excluded automatically. This provides a second layer of spoofing resistance: even if a counterfeit signal passes AIM+ spectral analysis, an implausible position shift will be caught and rejected by RAIM+.

**Supporting Technologies**

| Technology | Role in signal protection                                                                                                                                                          |
| ---------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **APME+**  | Eliminates multipath-induced position errors — prevents reflected signals from being mistaken for direct-path signals, which can mimic spoofing effects near structures or terrain |
| **IONO+**  | Mitigates ionospheric scintillation, particularly relevant at low latitudes where scintillation events can cause signal fading that jammers exploit                                |
| **LOCK+**  | Maintains tracking lock under mechanical shock and vibration — prevents brief signal gaps that jammers use as re-acquisition windows to inject false signals                       |

**Why Multi-Frequency, Multi-Constellation Matters for Jamming Resistance**

Single-frequency GNSS receivers are highly vulnerable — a jammer only needs to overpower one frequency band. The AeroNav-X5 tracks GPS, GLONASS, BeiDou, Galileo, NavIC, and QZSS simultaneously across L1, L2, L5, and L-band. A jammer that neutralizes one frequency or one constellation is automatically compensated by the remaining signals. Full L2 support via P(Y) code adds an encrypted signal path that consumer jammers cannot replicate.