CUAV C-RTK 2 HP GNSS Heading Module

The CUAV C-RTK 2 HP is a high-precision dual-antenna GNSS heading module designed for autonomous vehicles, UAVs, and robotics applications requiring centimeter-level positioning accuracy and real-time heading determination. Professional surveyors, drone operators, and roboticists use this module to achieve accurate attitude reference and precise geolocation in challenging environments where standard GPS fails. This product solves the critical problem of obtaining reliable heading and position data simultaneously, eliminating the need for separate compass modules and reducing system complexity in autonomous navigation systems.

Product Overview

The CUAV C-RTK 2 HP operates on the principle of Real-Time Kinematic (RTK) positioning combined with dual-antenna heading calculation. The module receives signals from multiple GNSS constellations including GPS, GLONASS, Galileo, and BeiDou, processing them through advanced algorithms to deliver centimeter-level accuracy. The dual-antenna configuration allows the system to calculate precise heading angles by measuring the baseline vector between two receivers, eliminating magnetic interference issues common in traditional compass-based systems. This architecture makes it ideal for applications where magnetic declination, metal structures, or electromagnetic noise would compromise conventional heading sensors.

The C-RTK 2 HP distinguishes itself through its high-precision RTK engine capable of achieving 2cm horizontal and 3cm vertical accuracy in optimal conditions, combined with heading accuracy of 0.2 degrees or better. The module integrates seamlessly with Pixhawk autopilot systems and supports multiple communication protocols including CAN, serial UART, and USB interfaces. Built-in IMU fusion algorithms enhance performance in signal-degraded environments, while the compact form factor and low power consumption make it suitable for battery-powered autonomous platforms. The module operates across a wide temperature range and includes robust filtering to handle dynamic motion scenarios typical in UAV and ground vehicle applications.

Key Specifications

Specification	Details
Product Type	Dual-Antenna RTK GNSS Heading Module
Brand	CUAV
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Horizontal Accuracy	2cm RTK, 0.5m DGPS
Vertical Accuracy	3cm RTK, 0.8m DGPS
Heading Accuracy	0.2 degrees or better
GNSS Constellations	GPS, GLONASS, Galileo, BeiDou
Update Rate	Up to 20Hz
Communication Interfaces	CAN, Serial UART, USB
Power Consumption	Approximately 3.5W typical operation
Operating Temperature	-40 to 85 degrees Celsius

Key Features

• Dual-Antenna Configuration: Eliminates magnetic compass dependency by calculating heading from baseline vector between two GNSS receivers, providing 0.2-degree heading accuracy without magnetic interference
• Multi-Constellation GNSS Support: Receives signals from GPS, GLONASS, Galileo, and BeiDou simultaneously, ensuring robust positioning in urban canyons and signal-degraded environments
• RTK Precision: Achieves 2cm horizontal and 3cm vertical accuracy in real-time kinematic mode, enabling centimeter-level autonomous vehicle navigation and precision surveying applications
• Pixhawk Integration: Native compatibility with Pixhawk autopilot systems through standardized CAN and serial interfaces, simplifying integration into existing autonomous platform architectures
• IMU Fusion Algorithms: Integrated inertial measurement unit fusion enhances positioning accuracy during dynamic maneuvers and brief signal outages, critical for UAV and ground vehicle applications
• High Update Rate: 20Hz output rate provides real-time heading and position updates suitable for fast-moving autonomous platforms requiring responsive navigation control

Applications and Use Cases

• Autonomous UAV Navigation: Provides precise heading reference for fixed-wing and rotorcraft UAVs performing surveying, mapping, and inspection missions where accurate orientation is critical for payload stabilization and flight control
• Precision Agriculture: Enables autonomous tractor guidance systems with centimeter-level accuracy for row-crop farming, variable rate application, and yield mapping operations requiring reliable heading determination
• Robotic Ground Vehicles: Supports autonomous ground vehicle navigation in GPS-denied urban environments by providing heading reference independent of magnetic compass, essential for autonomous delivery robots and industrial AGVs
• Surveying and Mapping: Delivers RTK-level positioning accuracy combined with precise heading for rapid surveying, photogrammetry ground control, and geospatial data collection in professional surveying applications
• Marine Autonomous Systems: Provides heading and position reference for autonomous surface vehicles and marine robotics operating in coastal and inland waterway environments where magnetic interference from metal hulls is problematic

How to Use

Installation of the CUAV C-RTK 2 HP requires careful antenna placement with adequate sky visibility and minimum 30cm baseline separation between the two antennas for optimal heading calculation. Mount the primary antenna at the vehicle's center of gravity and the secondary antenna forward along the longitudinal axis, ensuring both antennas maintain clear line-of-sight to the sky. Connect the module to your autopilot system using CAN or serial UART interface as per your flight controller specifications, then configure the baseline vector parameters in your autopilot firmware to match your physical antenna separation distance and orientation.

During initial setup, perform a compass calibration procedure specific to RTK heading modules, which typically involves rotating the vehicle in a horizontal plane to allow the system to establish accurate baseline vector measurements. Configure your ground station software to accept RTK corrections from a base station or NTRIP caster service, which is essential for achieving the 2cm accuracy specification. Verify heading output by observing real-time heading values in your autopilot telemetry stream while rotating the vehicle manually. Once operational, the module will automatically blend GNSS position, heading, and IMU data to provide robust navigation estimates suitable for autonomous flight or ground vehicle operation in both open-sky and partially obstructed environments.

Frequently Asked Questions

What is the minimum baseline distance required between the two antennas for accurate heading calculation?

The CUAV C-RTK 2 HP requires a minimum baseline separation of 30cm between the primary and secondary antennas for reliable heading calculation. Longer baselines improve heading accuracy, with 1-2 meter separations providing optimal performance. The baseline vector must be configured in your autopilot firmware to match your physical antenna placement exactly, as this parameter directly affects heading accuracy. Ensure both antennas maintain equal sky visibility and avoid mounting them at significantly different heights to minimize atmospheric error propagation.

Can this module operate without RTK corrections for basic positioning?

Yes, the C-RTK 2 HP can operate in DGPS mode without RTK corrections, achieving approximately 0.5m horizontal and 0.8m vertical accuracy. However, RTK corrections are essential for achieving the 2cm accuracy specification and are highly recommended for autonomous vehicle applications. RTK corrections can be obtained from a local base station, NTRIP caster services, or satellite-based augmentation systems. The module will automatically switch between RTK and DGPS modes based on correction availability, maintaining continuous navigation capability even if RTK service is temporarily unavailable.

How does the C-RTK 2 HP maintain heading accuracy during vehicle acceleration and dynamic maneuvers?

The module incorporates IMU fusion algorithms that blend GNSS heading measurements with inertial measurement unit data to maintain accurate heading estimates during dynamic vehicle motion. The integrated accelerometers and gyroscopes provide high-frequency heading updates between GNSS measurement cycles, enabling smooth heading output at the full 20Hz update rate even during aggressive vehicle maneuvers. This fusion approach is particularly valuable during UAV flight when rapid attitude changes occur, ensuring the autopilot receives consistent heading reference for stable flight control.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
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• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

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