CUAV C-RTK 2 High Precision RTK PPK GNSS Module

The CUAV C-RTK 2 is a dual-frequency multi-constellation GNSS module delivering centimeter-level positioning accuracy through Real-Time Kinematic (RTK) and Post-Processing Kinematic (PPK) capabilities. Professional surveyors, drone operators, and geospatial engineers rely on this module for precision mapping, autonomous navigation, and high-accuracy geolocation tasks where decimeter or centimeter accuracy is non-negotiable. This module solves the critical challenge of achieving survey-grade positioning in real-time without requiring expensive base station infrastructure or complex setup procedures.

Product Overview

The CUAV C-RTK 2 operates on dual-frequency GNSS technology, simultaneously tracking signals from GPS, GLONASS, Galileo, and BeiDou constellations to achieve rapid convergence and reliable positioning in challenging environments. The module utilizes advanced integer ambiguity resolution algorithms combined with multi-constellation redundancy to deliver horizontal accuracy of 1.2 cm plus 0.8 ppm RMS and vertical accuracy of 2.4 cm plus 1.0 ppm RMS in RTK mode. Its architecture incorporates a high-performance u-blox ZED-F9P GNSS receiver paired with integrated communication interfaces, enabling seamless integration into UAV platforms, ground control stations, and robotic systems.

What distinguishes the C-RTK 2 is its compact form factor combined with exceptional positioning reliability in urban canyons and obstructed environments where single-frequency modules typically fail. The module features built-in CAN and serial interfaces, supports multiple RTCM correction formats, and can operate in both base station and rover configurations. Its power efficiency and lightweight design make it ideal for battery-constrained applications like fixed-wing UAVs and ground robots, while the dual-frequency architecture ensures positioning integrity even during atmospheric disturbances or ionospheric anomalies that would degrade single-frequency performance.

Key Specifications

Specification	Details
Product Type	Dual-Frequency Multi-Constellation GNSS RTK PPK 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
GNSS Constellations	GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS
RTK Horizontal Accuracy	1.2 cm plus 0.8 ppm RMS
RTK Vertical Accuracy	2.4 cm plus 1.0 ppm RMS
Time to First Fix	Less than 10 seconds (with correction signal)
Communication Interfaces	CAN, UART, USB, SPI
Power Consumption	Approximately 700 mA at 5V
Operating Temperature	-40 to 85 degrees Celsius
Dimensions	Compact integrated module form factor

Key Features

• Dual-Frequency L1/L2 GNSS Reception: Eliminates ionospheric delay errors by processing both frequency bands, enabling reliable centimeter-level accuracy in any atmospheric condition
• Multi-Constellation Support: Tracks GPS, GLONASS, Galileo, and BeiDou simultaneously for superior satellite geometry and rapid integer ambiguity resolution even in obstructed environments
• Real-Time Kinematic Mode: Delivers 1.2 cm horizontal accuracy in real-time with external RTCM correction input, enabling live precision positioning for autonomous systems
• Post-Processing Kinematic Capability: Records raw GNSS observations for offline processing, achieving survey-grade accuracy without real-time correction infrastructure
• Integrated CAN Interface: Native CAN bus connectivity simplifies integration with autopilot systems, eliminating need for additional serial-to-CAN converters
• Compact Module Design: Lightweight and power-efficient architecture suitable for weight-constrained UAV platforms and battery-powered ground robots
• Multi-Format Correction Support: Compatible with RTCM 3.x, u-blox proprietary formats, and NTRIP correction streams from public and private base stations
• Extended Operating Range: Functions reliably in challenging RF environments including dense urban areas, forests, and near metallic structures

Applications and Use Cases

• Precision Agricultural Mapping: Deploy on agricultural drones for yield monitoring and variable-rate application mapping with centimeter-level georeferencing accuracy
• Autonomous Ground Vehicles: Provide localization for self-driving robots, delivery platforms, and autonomous lawn mowers operating in GPS-denied or challenging environments
• Surveying and Cadastral Mapping: Enable rapid property boundary surveys, topographic mapping, and infrastructure asset documentation without expensive total station equipment
• Construction Site Monitoring: Track equipment positions, monitor structural deformation, and guide autonomous earthmoving machinery with real-time centimeter accuracy
• Environmental Monitoring: Precisely geolocate sensor deployments, wildlife tracking collars, and environmental sampling points for scientific research applications
• Photogrammetry and 3D Mapping: Provide direct georeferencing for drone-based orthophoto and 3D model generation, eliminating need for ground control points
• Power Line and Utility Inspection: Enable precise asset mapping and defect documentation for electrical grid maintenance and telecommunications infrastructure surveys
• Emergency Response and Disaster Assessment: Rapidly map affected areas with survey-grade accuracy for damage assessment and emergency resource deployment

How to Use

Installation of the CUAV C-RTK 2 begins with secure mechanical mounting on your platform with the antenna positioned for unobstructed sky view, ideally with 5 degrees minimum elevation mask clearance. Connect power supply (typically 5V regulated) and establish communication via CAN or UART interface to your flight controller or ground station computer. Configure the module using u-center software or your autopilot's parameter interface, selecting RTK rover mode if using external base station corrections, or PPK mode if recording raw observations for post-processing. For RTK operation, establish correction source by connecting to a nearby base station via NTRIP protocol or local radio link transmitting RTCM 3.x correction messages.

Once powered and receiving corrections, the module will output high-accuracy position data through its configured interface at typical 5-20 Hz update rates. Monitor the solution status indicator to confirm RTK fixed solution achievement, which typically occurs within 30-60 seconds of receiving quality correction data. For PPK workflows, configure logging of raw GNSS observations at high frequency, then post-process recorded data using RTKLIB, Emlid Studio, or commercial surveying software with dual-frequency processing algorithms. Always verify antenna placement avoids multipath reflections from nearby metal structures or water surfaces, as these degrade positioning accuracy even with dual-frequency correction.

Frequently Asked Questions

What is the difference between RTK and PPK modes in the CUAV C-RTK 2?

RTK (Real-Time Kinematic) provides centimeter-level positioning in real-time by receiving correction signals from a base station during operation, making it ideal for live autonomous navigation. PPK (Post-Processing Kinematic) records raw GNSS observations during flight or operation, then processes them offline against base station data recorded simultaneously, delivering equivalent accuracy without requiring real-time correction infrastructure. PPK is preferred for surveying applications where real-time accuracy is unnecessary, while RTK is essential for autonomous vehicle guidance and live precision positioning tasks.

Can the CUAV C-RTK 2 work without external corrections or base station?

The module can provide standard GNSS positioning without corrections, but accuracy degrades to 2-5 meters depending on atmospheric conditions and satellite geometry. For centimeter-level accuracy, external corrections are required. These can come from a local base station you operate, public NTRIP correction services like CORS networks, or commercial correction providers. In PPK mode, you can achieve centimeter accuracy without real-time corrections by post-processing with base station data recorded during the same time period.

How does dual-frequency GNSS improve accuracy compared to single-frequency modules?

Single-frequency modules cannot directly measure ionospheric delay, the largest error source in GNSS positioning. Dual-frequency receivers track both L1 and L2 signals, allowing direct calculation and elimination of ionospheric delay errors. This enables faster integer ambiguity resolution, improved performance in challenging environments, and maintains accuracy during ionospheric disturbances when single-frequency solutions fail. The C-RTK 2's dual-frequency capability makes it significantly more reliable for professional applications requiring consistent centimeter-level accuracy.

Is the CUAV C-RTK 2 compatible with my autopilot system?

The C-RTK 2 features standard CAN and UART interfaces compatible with most modern autopilots including Pixhawk, Ardupilot, and PX4 systems. Verify your autopilot supports dual-frequency RTK input and review integration documentation for your specific flight controller model. CUAV provides detailed integration guides for popular platforms. If your autopilot lacks native RTK support, you may need additional middleware or custom firmware modifications.

What correction sources work with the CUAV C-RTK 2?

The module accepts RTCM 3.x correction messages via NTRIP protocol over internet or local radio links. Compatible sources include government CORS networks, commercial correction providers like Emlid Caster, private base stations you operate, and regional augmentation systems. Configuration depends on your correction source type and available communication bandwidth. For best performance, use corrections from a base station within 30-50 kilometers of your rover position.

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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