C-RTK 3 G5 Anti-Jamming & Spoofing GNSS Module

0.6 cm + 0.5 ppm RTK Positioning Accuracy.
Dual-Antenna Orientation Replaces Electronic Compass and No Calibration Required
Multi‑Constellation Multi-Band GNSS Reception System.
STM32H5 High-Performance Processor.
CAN FD + 20 Hz High Update Rate.
Interference Detection and Alerting.
All-Round Anti-Jamming & Anti-Spoofing.
Integrated LOCK+ for Stable Tracking Under High Vibration and Shock.
2-Channel EVENT Inputs with Configurable PPS output.
Compatible with ArduPilot & PX4.

UAV Anti-Jamming & Spoofing GNSS Module.无人机抗扰防骗定位定向模块。C-RTK 3 G5

Centimeter-Level Positioning, BreakthroughSingle-Point and RTK Positioning Accuracy

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.

DGNSS Accuracy：0.7 m

Standalone Accuracy：1.9 m

RTK Accuracy：1 cm+1 ppm

DGNSS Accuracy：0.4 m

Standalone Accuracy：1.2 m

RTK Accuracy：0.6 cm+0.5 ppm

Vertical Accuracy:

Horizontal Accuracy:

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.

BeiDou

QZSS

GPS

Galileo

GLONASS

Execution

Performance

Wait

Zero

1023

CoreMark

Computing

MHz

250

STM32H5 Processor, High-Performance Core

Powered by the STM32H5 high-performance processor featuring a 250 MHz main frequency and an 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.

Comparison :

5 Hz

1 Mbps

C-RTK 3 G5：

CAN：

CAN FD：

Speed

Others :

20 Hz

8 Mbps

Refresh Rate

Time (s)

Comparison Table of Data Rates: Traditional CAN vs. CAN FD Buses

Traditional CAN

CAN FD

Data Segment Rate (Mbps)

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 Ⅰ, Powerful Anti-Spoofing

Leveraging AIM+ detection technology, satellite reliability is graded, marked, and filtered based on factors such as abnormal spoofing signal characteristic, space-time and space-frequency verification, multi-constellation cross-validation, and inertia coupling. In addition, OSNMA satellite security authentication mechanism is introduced to provide comprehensive protection against artificial signal spoofing.

Incorporates an 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.

Signal Injection

Message

Frequency Verification

Multi-Band / Multi-

Graded, Marked, and Filtered

AIM + Space-Time / Space-

Constellation Cross-Validation

OSNMA Satellite-Level Security Authorization Mechanism

Blocks Forged

Encrypted Navigation

Filter-Based Active Mitigation

RAIM+ : Autonomous integrity monitoring, prevents faulty positioning.

IONO+ : lonospheric scintillation detection technology, protects against ionospheric disturbance.

APME+ : Multipath anti-jamming technology, reduces errors caused by building-reflected signals.

Automated Monitoring and

AIM+ : Monitors and filters to eliminate electromagnetic interference and signal suppression.

Output Clean Positioning Data

All-Round Protection Ⅱ, 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.

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.

Actual value

Antenna Height [m]

Integrated LOCK+ technology：

LOCK+ : Copes with severe vibration and shock, maintains stable satellite signal tracking, and prevents signal loss.

Time [s]

Measured value

Fully Traceable Data, Support Local Data Logging

Equipped with a 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.

Specifications & Parameters

C-RTK 3 G5 Basic Parameters
Processor	STM32H5 Arm® Cortex®-M33 250 MHz
Hardware Channel	789 pcs
Supported 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 m DGNSS Accuracy: Horizontal 0.4 m, Vertical 0.7 m RTK Accuracy: Horizontal 0.6 cm + 0.5 ppm Vertical 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 ns Event Accuracy: <3 ns Cold 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/HzAcquisition 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 Dimensions chart

C-RTK 3 G5 Pinouts

C-RTK 3 G5 Video

ArduPilot, Dronecode, and PX4 Long-Term Partners

CUAV Tech Inc., Ltd. is a National High-Tech Enterprise and Guangdong Provincial Specialized, Sophisticated, Innovative SME that focuses on open-source unmanned system innovation technologies. It integrates R&D, production, sales, after-sales service, and technical support into a cohesive operation. The company maintains long-term collaborative partnerships with leading open-source organizations such as ArduPilot, Dronecode, and PX4.