> 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/gnss-technology-and-signal-tracking.md).

# GNSS Technology & Signal Tracking

**Hardware Channels:** 448 hardware channels for simultaneous tracking of all visible supported satellite signals.

**Tracking:** All-in-view satellite tracking — multi-constellation, multi-frequency.

#### **Supported Constellations & Signals**

| Constellation | Signals                                 |
| ------------- | --------------------------------------- |
| GPS           | L1C/A, L1PY, L2C, L2P, L5               |
| GLONASS       | L1CA, L2CA, L2P, L3 CDMA                |
| BeiDou        | B1I, B1C, B2a, B2b, B2I, B3             |
| Galileo       | E1, E5a, E5b, E5 AltBoc, E6             |
| QZSS          | L1 C/A, L1 C/B, L2C, L5                 |
| NavIC         | L5                                      |
| SBAS          | EGNOS, WAAS, GAGAN, MSAS, SDCM (L1, L5) |
| L-Band        | On-module supported                     |

**Advanced Features**

* Full L2 support via P(Y) code
* 5-constellation RTK (base and rover)
* Moving base RTK
* OSNMA support

#### **Advanced Mitigation Technologies (GNSS+)**

| Technology | Description                                                                                                                 |
| ---------- | --------------------------------------------------------------------------------------------------------------------------- |
| **AIM+**   | Premium anti-jamming and anti-spoofing interference monitoring and mitigation for narrow-band, wide-band, and chirp jammers |
| **LOCK+**  | Superior tracking robustness under heavy mechanical shocks or vibrations                                                    |
| **APME+**  | A posteriori multipath estimator for code and phase multipath mitigation — disentangles direct signals from reflections     |
| **IONO+**  | Advanced scintillation mitigation for protection against ionospheric disturbances                                           |
| **RAIM+**  | Receiver Autonomous Integrity Monitoring                                                                                    |