4G GNSS-RTK High Precision Positioning Kit (EMEA & Thailand, GPS / GLONASS / Galileo / BDS / QZSS)

GNSS-RTK High Precision Positioning Kit (4G Version) is a centimeter‑level positioning solution designed for robotics navigation, asset tracking, and geospatial data collection. By leveraging Network RTK technology, this high‑accuracy GNSS positioning system connects to a CORS network through an onboard 4G module to receive RTCM correction data via the Ntrip protocol, removing the need for a traditional local base station. Multi‑constellation and multi‑band satellite reception enables reliable performance with convergence times under 10 seconds. A flexible Gravity interface supporting I2C and UART simplifies integration with development platforms such as Arduino, ESP32, and Raspberry Pi.

Figure: Positioning Flowchart

Wide-Area Network RTK Coverage

Unlike traditional RTK systems limited by short‑range radio communication, this network‑based GNSS positioning module accesses correction data through a 4G connection to an existing CORS infrastructure. Such architecture expands operational coverage to approximately 15–20km while maintaining consistent centimeter‑level positioning accuracy. Removal of the dedicated base station reduces deployment complexity and hardware costs while enabling high‑precision positioning across a much larger service area, provided that CORS service coverage and a stable 4G signal are available.

Robust Multi‑Constellation & Multi‑Band Reception

High reliability and stable positioning performance are achieved through simultaneous tracking of multiple satellite constellations, including GPS, GLONASS, Galileo, BDS, and QZSS. Multi‑frequency reception across bands such as GPS L1/L5, Galileo E1/E5a, and BDS B1I/B2a significantly reduces ionospheric errors and multipath interference. This advanced satellite tracking capability allows the RTK navigation module to maintain strong signal availability and precise location locking even in complex outdoor environments where satellite visibility may fluctuate.

Simplified Deployment and Integration

Deployment becomes significantly easier compared with conventional RTK base‑rover configurations. Operation only requires inserting a 4G SIM card and configuring the module with valid CORS credentials, avoiding the logistical burden of installing and maintaining a base station. The Gravity interface provides selectable I2C and UART communication, allowing seamless connection with common microcontrollers and single‑board computers. Such flexible hardware compatibility enables rapid integration into robotics platforms, precision tracking systems, and outdoor sensing projects.

Figure: Wiring Diagram of GNSS-RTK positioning kit

Figure: Differences Between Traditional RTK and Network RTK Positioning

Application Summary

This high‑precision GNSS navigation kit provides an efficient positioning solution for outdoor robotics, autonomous vehicles, and geospatial measurement tasks. Network‑based RTK correction combined with multi‑band satellite tracking enables stable centimeter‑level positioning across wide areas. Reliable communication interfaces and simplified setup make this precision navigation module well suited for robotics research, fleet tracking systems, agricultural automation, and advanced positioning experiments.