Introduction
T-RTK UM982: Cost-Effective Centimeter-Level Positioning Solution.
This module features a modular, stackable design that integrates mobile station, base station, 4G, and radio functionalities. It includes a built-in magnetic compass, Wi-Fi hotspot, and supports single/dual antenna configurations for applications like drones, unmanned vehicles, and surveyingPowered by the UM982 all-system, all-frequency chip, it achieves a cold start in <30s, hot start in <4s, and provides a 20Hz update rate, supporting BeiDou, GPS, and other global satellite systems.It offers versatile interfaces (USB-C, UART, flight controller port) for direct connection to Pixhawk flight controllers and compatibility with embedded devices. Drivers for ROS, Python, and C++ facilitate access to position, velocity, and heading data.An optional all-in-one base station version provides up to 8 hours of battery life for portable, plug-and-play operation.
Product Features
Full-Star Full-Frequency
Centimeter-level positioning
Multi-platform compatibility
Multi-mode communication
Built-in WiFi
Modular design
Multi-antenna interface
Built-in magnetic compass
Expanded Communication Interfaces
Anti-magnetic interference
Support ROS
Secondary development
All-Satellite All-Frequency, Worry-Free Signal
Supports global navigation systems such as BDS/GPS, with multi-frequency signal reception, enabling rapid signal acquisition even in complex environments to ensure stable operation.
Centimeter-Level Accuracy, Precision Guaranteed
Utilizes Real-Time Kinematic (RTK) technology to deliver real-time centimeter-level positioning accuracy, meeting stringent requirements for professional applications like surveying and construction layout.
Multi-Platform Compatibility, Broad Applicability
Designed for flexible integration with diverse equipment including drones and unmanned vehicles, adapting to varied high-precision positioning needs across industries.
Multi-Mode Communication, Flexible and Efficient
Supports self-established base stations or connection to CORS networks, with configurable communication modules (e.g., 4G, radio) to ensure robust and adaptable differential data links.
Cumulative sales surpass 10,000 units, shipped to over 50 countries worldwide
Modular Block Diagram
Modular Design
Features a stackable, modular design incorporating mobile units, base station units, 4G communication modules, 5-kilometer radio modules, Wi-Fi hotspots, and other components.
Extensive Interface Configuration
Integrated Type-C (combined power delivery/debugging/communication), dual serial ports (4-pin basic communication + 7-pin flight controller interface), PPS precision timing, and I²C direct connection to magnetic compass.
Multiple communication Methods
Supports direct connection to CORS via 4G modules radio ad hoc networking, and Python APlintegration with CORS, offering flexible adaptation to diverse scenarios.
Built-in Magnetic Compass
Features an integrated IST8310 magnetometer chip that connects directly to Pixhawk drone flight controllers, enabling high-precision positioning and heading measurement.
WiFi Hotspot Networking
The base station incorporates a built-in WiFi hotspot for wireless connectivity, enabling UDP-based sharing of RTCM differential data packets.Multiple Mission Planner or QGC ground stations can be paired with remote controllers to achieve drone swarm positioning.
Flexible single/dual antenna switching
Flexible switching between SMA single-antenna direct plug and MMCX dual-antenna connectors.
Application Case
Interface and Wire Sequence
Fastening method
Product size
Technical Parameter
| Parameters | Model | |||
| T-RTK UM982 Mobile | T-RTK UM982 Base | T-RTK UM982 OneBase | ||
| Positioning Module | Model | UM982 | ||
| Basic Information | Passageway | 1408 Passageway，Based on NebulasIV | ||
| Antenna Interface | MMCX*2、SMA*1 | MMCX*2、 | SMA*1 | |
| SMA*1 | ||||
| Mode | BDS B1I/B2I/B3I、GPS L1C/L2/L5 | |||
| GLONASS G1/G2、Galileo E1/E5a/E5b | ||||
| QZSS L1/L2/L5、SBAS | ||||
| Primary antenna frequency | BDS: B1I、B2I、 B3I | |||
| GPS: L1C/A、L2P (Y)/L2C、L5 | ||||
| GLONASS: G1、G2 | ||||
| Galileo: E1、E5a、E5b | ||||
| QZSS: L1、L2、L5 | ||||
| From antenna frequency points | BDS: B1I、B2I、 B3I | |||
| GPS: L1C/A、L2C | ||||
| GLONASS: G1、G2 | ||||
| Galileo: E1、E5b | ||||
| QZSS: L1、L2 | ||||
| Performance Metrics | RTK（RMS） | Flat：0.8cm+1ppm | ||
| Elevation：1.5cm+1ppm | ||||
| Single-point positioning（RMS） | Flat：1.5m | |||
| Elevation：2.5m | ||||
| DGPS（RMS） | Flat：0.4m+1ppm | |||
| Elevation：0.8m+1ppm | ||||
| PPP(RMS) | Flat：5cm | |||
| Elevation：10cm | ||||
| Directional accuracy(RMS) | 0.1°/1m Baseline | |||
| PPS accuracy(RMS) | 20 ns | |||
| Speed Accuracy(RMS) | 0.03 m/s | |||
| Cold start | <30 s | |||
| Hot Start | < 4 s | |||
| Initialization time | <5s(Typical value) | |||
| Initialization Reliability | > 99.9% | |||
| Data refresh rate | Default 2 Hz, maximum 20 Hz | |||
| Positioning and direction finding at 20Hz, 20Hz raw observation measurements | ||||
| Differential data | RTCM 3.X | |||
| Data Format | NMEA-0183, Unicore | |||
| Baud rate | 4800bps~921600bps（Default 115200bps） | |||
| Magnetometer | Mode | IST8310 | ||
| Measurement Range | ±1600 μT (X, Y Axis)、±2500 μT (Z Axis) | |||
| Offset temperature drift | 0.024 μT/°C | |||
| Physical Properties | Dimensions | 39mm*39mm*12.5mm | 39mm*39mm*22.1mm | 147mm*82mm*36mm |
| Weight | 34g（Without antenna） | 52g（Without antenna） | 386g | |
| Electrical Characteristics | voltage | 5V | ||
| Power consumption | 1300mW | 2000mW | 2888mW | |
| Range | – | – | 9h | |
| Environmental Indicators (RTK Chip)) | Operating Temperature | -40℃~+85℃ | ||
| Storage temperature | -55℃~+95℃ | |||
| Humidity | 95% non-condensing | |||
| Vibration | GJB150.16-2009，MIL-STD-810F | |||
| Impact | GJB150.18-2009，MIL-STD-810F | |||
| Communication Interface | I2C | I2C x 1（Shared with 7-pin UART） | ||
| USB port | USB x 1 | |||
| UART | 4Pin UART x 1,7Pin UART x 1 | 7Pin UART x 1 | ||
| Integrated Base Station | Tripod height | Up to 1.80m | ||
| External Power Supply Port | XT30 x 1，12V | |||
| Antenna Interface | Retain only SMA | |||
| Voltage Display | Support | |||
| 4G module | Internet standards | 4G full network compatibility, supports China Mobile/China Unicom/China Telecom | ||
| Dimensions | 39mm*39mm*14.5mm(Without antenna） | |||
| Weight | 49g(With antenna） | |||
| Operating Voltage | 5V（RTK Direct Power Supply） | |||
| Power consumption | ＜0.3W | |||
| Baud rate | Only supports 115200 | |||
| Radio Module | Networking Method | Point-to-multipoint, central network configuration | ||
| Maximum number of devices in a network | Theoretical upper limit: 100 | |||
| Operating frequency band | 410~525MHz | |||
| Maximum output power | 22±0.5dBm@470MHz | |||
| Transmission rate | maximum 0.268Kbps | |||
| Communication range | maximum 5km（Air-to-air） | |||
| Dimensions | 39mm*39mm*14.5mm(Without antenna） | |||
| Weight | 49g(With antenna） | |||
| Operating Voltage | 5V（RTK Direct Power Supply） | |||
| Power consumption | ＜0.4W | |||
| Baud rate | Only supports 115200 | |||
| Four-arm helical antenna | Operating Mode | GPS L1/L2/L5 | ||
| BDS B1/B2/B3 | ||||
| GLONASS L1/L2/L3 | ||||
| GALILEO E1/E5a/E5b/E6 | ||||
| SBAS L1/L5,QZSS L1/L2/L5/L6 | ||||
| IRNSS L5 | ||||
| gain | 32±2dB | |||
| Interface | SMA-J | |||
| Dimensions | Φ27.3*58.6mm | |||
| Weight | 16g | |||
| Mushroom-head antenna | Operating Mode | GPS L1/L2/L5 | ||
| BDS B1I/B2I/B3I/B1C/B2a/B2b | ||||
| GLONASS L1/L2/L3 | ||||
| GALILEO E1/E5a/E5b/E6 | ||||
| SBAS L1/L5,QZSS L1/L2/L5/L6 | ||||
| IRNSS L5, L-Band | ||||
| gain | 38±2dB | |||
| Interface | TNC-K | |||
| Dimensions | Φ154*64.2mm | |||
| Weight | 280g | |||
| Four-Arm Helical Antenna Mount | Dimensions | Height 11.7cm | ||
| Weight | 16g（Feeder-containing） | |||
Shipping list
