C-RTK 3 G5 GNSS Module Feature:
- 0.6 cm +0.5 ppm RTK Positioning Accuracy
- Multi-Constellation Multi-Band GNSS Reception System
- All-Round Anti-Jamming & Anti-Spoofing
- Integrated LOCK+ for Stable Tracking Under High Vibration and Shock
- 2-Channel EVENT Inputs with Configurable PPS output
- 20 Hz High Update Rate & CAN FD High-Speed Bus Transmission
- Dual-Antenna Orientation Replaces Electronic Compass and No Calibration Required
- Compatible with ArduPilot & PX4
C-RTK 3 G5 GNSS Module Brief:
C-RTK 3 G5 is a next-generation General-Purpose GNSS Module from CUAV. It integrates an STM32H5 high-performance processor and GNSS+ algorithm suite, with support for CAN FD bus. Delivering centimeter-level positioning accuracy and dual-antenna heading measurement, it also establishes a comprehensive signal protection framework that combines centimeter-level with robust defense. It can effectively and effortlessly handle complex environments involving electromagnetic interference, signal spoofing, and high vibration, providing stable, secure, and accurate positioning and orientation support for unmanned systems.
C-RTK 3 G5 GNSS Module Specification:
C-RTK 3 G5 Basic Parameters | |
| Processor | STM32H5 Arm® Cortex®-M33 250 MHz |
| Hardware Channel | 789 pcs |
| Support Constellation and Band | GPS: L1C/A、L2C、L2PY、L5、L1CGLONASS: L1CA、L2CA、L2P、L3 CDMABeiDou: B1I、B1C、B2a、B2I、B3I、B2bGalileo: E1、E5a、E5b、E6QZSS: L1C/A、L1 C/B、L2C、L5、L6 |
| Antenna Support | Dual Antenna (configurable single/dual antenna working mode) |
| GNSS+ Technical Kit | AIM+ (anti-jamming / anti-spoofing),LOCK+ (vibration & shock resistance),APME+ (multipath mitigation),IONO+ (ionospheric protection),RAIM+ (integrity monitoring) |
| Support Service | Galileo HAS Precision Service (look-ahead function, enabled upon software update), Galileo OSNMA Service |
| Raw Data Output | Support / TF Card Recording |
| Positioning Accuracy | Standalone Accuracy: Horizontal 1.2 m, Vertical 1.9 mDGNSS Accuracy: Horizontal 0.4 m, Vertical 0.7 mRTK Accuracy: Horizontal 0.6 cm + 0.5 ppmVertical 1 cm +1 ppm |
| Velocity Accuracy | 3 cm/s |
| Heading Accuracy | At 1 m antenna separation, heading accuracy: 0.15 °At 5 m antenna separation, heading accuracy: 0.03 ° |
| Max Update Rate | 20 Hz |
| RTK Initialization Time | 7 s (baseline < 40 km) |
| Time Accuracy Related | PPS Resolution: 1.4 nsEvent Accuracy: <3 nsCold Start Time: <35 s (no Ephemeris, no Coarse Position)Hot Start Time: <10 s (with Ephemeris, with Coarse Position)Re-Acquisition Time: 1 s |
| Tracking and Acquisition Threshold | Tracking Threshold: 20 dB/Hz Acquisition Threshold: 30 dB/Hz |
| Electronic Compass | RM3100 |
| Measurement Range | ±1100 μT (wide dynamic magnetic field adaptation) |
| Resolution | 13 nT@200 Cycle Count; Detection Sensitivity 2.7 nT at 1Hz |
| Noise Level | 15 nT@200 Cycle Count; Noise Floor 4 pT/√Hz (1Hz) |
| Linearity | 0.50% within ±200 μT |
| Protocol | DroneCAN |
| Communication Rate | 1 Mbit/s ( CAN )8 Mbit/s ( CAN FD ) |
| Upgrade Support | Support |
| Firmware | C-RTK 3 M4C |
Port Type | |
| Data Interface | JST GH 1.254P/TYPE-C USB |
Hardware Parameters | |
| Size | 55.5×50×16.5 mm [Includes screw holes] |
| Weight | 43.5g(Excludes antenna and feeder cable) |
| Operating Temperature | -10℃~+80℃ |
CRA-602 Antenna Specifications | |
| Horizontal coverage angle | 360° |
| Polarization | Right-hand circular polarization |
| Gain(dB) | 38±2 |
| Connector type | SMA-J |
| Antenna size | Φ40*84.5 mm |
| Antenna weight | 36 g |
C-RTK 3 G5 GNSS Module Product Description:
Centimeter-Level Positioning + Dual-Antenna Direction Finding
It features centimeter-level RTK positioning accuracy, with a horizontal accuracy of up to 0.6 cm + 0.5 ppm and vertical accuracy of up to 1 cm + 1 ppm, and an initialization time of only 7 seconds. It supports dual-antenna heading function, enabling measurement of heading & pitch or heading & roll, providing accurate and reliable heading data. It is compatible with multiple positioning modes, such as Standalone and DGNSS, with a velocity accuracy of up to 3 cm/s. Users can switch modes according to the environment and tasks, satisfying the centimeter-level positioning and attitude perception needs of unmanned systems in complex and dynamic environments.
Dual-Antenna Heading Determination. No Complicated Calibration Required
By fixing the dual-antenna baseline length and calculating the baseline vector using carrier phase difference resolution, it outputs heading attitude data with accuracy up to 0.03°. When mounted on a vehicle, it replaces the electronic compass, which is susceptible to magnetic interference, eliminating tedious calibration and providing more stable and reliable orientation.
Multi-band Multi-Constellation Reception Full Coverage in Complex Environments
Built-in with 789 hardware channels, it simultaneously receives full-band signals from GPS, GLONASS, BeiDou, Galileo, and QZSS. This significantly enhances signal acquisition capability and ensures reliable positioning even in signal-challenged environments such as urban canyons and tree-shaded areas. It is compatible with Galileo HAS precision services, and its look-ahead function can be continuously upgraded via firmware updates to maintain technological advancement.
STM32H5 Processor High-Performance Core
Powered by the STM32H5 high-performance processor featuring 250 MHz main frequency and Arm Cortex-M33 core, it delivers up to 1023 CoreMark of computing performance, providing ample computational support for complex algorithms.
Ture High Refresh Rate CAN FD + High Update Rate
Industry-first integration of CAN FD bus into GNSS positioning module. Compared to traditional CAN, the data rate is increased from 1 Mbps to 8 Mbps. Optimized ArduPilot / PX4 firmware support ensures that the 20 Hz refresh rate is not limited to GNSS module performance but truly serves centimeter-level navigation, significantly enhancing navigation accuracy.
Precise Identification Interference Detection Display Alert
Equipped with dedicated GNSS RF interference detection technology, it accurately identifies the operating frequency band and signal strength of interfering signals. Interference information is pushed in real-time to the smart controller via DroneCAN / UART interfaces and clearly displayed on the ground station, helping users immediately understand the RF interference environment, effectively avoid risks, and ensure operational safety.
All-Round Protection 1 Powerful Anti-Spoofing
Leveraging AIM+ detection technology, satellite reliability is graded, marked, and filtered based on factors such as abnormal spoofing signal characteristics, space-time and space-frequency verification, multi-constellation cross-validation, and inertia coupling. In addition, the OSNMA satellite security authentication mechanism is introduced to provide comprehensive protection against artificial signal spoofing.
Incorporates OSNMA satellite-level security authorization mechanism, compatible with Galileo encrypted navigation message authentication technology. This verifies the legitimacy of information at the signal source, effectively resisting positioning tampering caused by forged signal injection. It ensures the authenticity and reliability of the signal source, blocks the risk of forged signal injection, and provides secure positioning for equipment operation.
Integrates AIM+integrated anti-jamming and spoofing detection, which automatically detects narrowband electromagnetic interference, malicious human interference, and signal spoofing. It can mark and actively mitigate these situations in real time without manual intervention, continuously outputting clean positioning data to prevent intentional interference and detection.
All-Round Protection 2 Robust Anti-Jamming
Integrates four auxiliary protection technologies —— AIM+、APME+、IONO+、RAIM+—— to systematically address issues such as multipath interference, ionospheric disturbance, data anomaly, and signal suppression, which significantly enhances the positioning stability and reliability of the system under dynamic and complex environments.
AIM+: Monitors and filters to eliminate electromagnetic interference and signal suppression.
APME+: Multipath anti-jamming technology reduces errors caused by building-reflected signals.
IONO+: Ionospheric scintillation detection technology protects against ionospheric disturbance.
RAIM+: Autonomous integrity monitoring, prevents faulty positioning.
Integrated LOCK+ | Resilience Against High-Frequency Vibration and Shock
Specifically optimized for severe vibration and shock scenarios, LOCK+ enables continuous and stable tracking of satellite signals. It significantly reduces the risk of positioning latency in dynamic environments, ensuring continuous and uninterrupted positioning in complex conditions such as high-frequency vibration and rapid movement.
Fully Traceable Data Support Local Data Logging
Equipped with TF card local storage, it records comprehensive data including GNSS raw data, positioning results, attitude data, and interference logs. This ensures high data security and fast read speeds, facilitating raw data review, analysis, and performance optimization.
Extensive Ecosystem Compatibility DroneCAN Communication Protocol
Equipped with 1 CAN, 1 UART, and USB 2.0 HS interfaces, it features high extension and rich interfaces. Adopting the DroneCAN protocol, it is fully compatible with ArduPilot & PX4 mainstream open-source platforms. Paired with CUAV open-source controllers, it is suitable for autonomous unmanned systems requiring centimeter-level positioning and high reliability, including unmanned surface vessels, robots, multi-rotors, VTOL fixed-wing aircraft, and helicopters.
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