HolyBro H-RTK Unicore UM982 — Dual Antenna RTK GPS, Moving Baseline Yaw, 0.8cm RTK Accuracy, 20Hz, IST8310 Compass, for Pixhawk & UAV Autopilots
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HolyBro H-RTK Unicore UM982 — Dual Antenna RTK GPS, Moving Baseline Yaw (GPS Heading), 0.8cm RTK Accuracy, 20Hz, IST8310 Compass, for Pixhawk Series & UAV Autopilots
The HolyBro H-RTK Unicore UM982 is a professional dual-antenna RTK GNSS module built around the Unicore UM982 chip. Its standout capability is Moving Baseline Yaw (GPS Heading) — providing compass-free heading determination from a single module with two helical antennas. This eliminates yaw errors caused by motor interference, metallic structures, or environmental magnetic disturbances — making it ideal for large UAVs, survey platforms, and autonomous vehicles operating in magnetically challenging environments.
It supports full RTK positioning with 0.8cm horizontal accuracy, 20Hz update rate, and simultaneous multi-constellation reception (GPS, GLONASS, Galileo, BDS, QZSS). Plug-and-play with all Pixhawk and ArduPilot/PX4 autopilots via standard JST-GH connectors.
Note: Status LED driver support requires PX4 1.14 or ArduPilot 4.4.0 and later. Base station use requires manual configuration — it is recommended to use the H-RTK F9P-Base or F9P Helical as the base station, as Mission Planner and QGroundControl cannot auto-configure the UM982 as a base station at this time.
Key Features
- Moving Baseline Yaw (GPS Heading) — Dual-antenna design provides compass-free yaw determination with a single module; works without RTCM corrections from a base station
- Replaces Traditional Compass — Eliminates magnetic interference from motors, ESCs, and metallic airframe components
- 0.8cm + 1ppm RTK Accuracy (Horizontal) — Sub-centimeter precision for precision mapping, inspection, and autonomous navigation
- 0.1° Heading Accuracy — Per 1m baseline; exceptional directional precision for fixed heading UAVs
- 20Hz Positioning & Heading Update Rate — High-frequency outputs for responsive autopilot control
- Multi-Constellation GNSS — GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5a/E5b, BDS B1I/B2I/B3I, QZSS L1/L2/L5
- IST8310 Compass — Integrated magnetometer for additional heading reference
- Integrated LED & Safety Switch — Standard Pixhawk-compatible status LED and arming button
- Tri-Port Connectivity — GH 10P (autopilot), USB-C (configuration), UART2 GH 6P (RTCM corrections)
- Plug-and-Play with Pixhawk Series — Compatible with Pixhawk 4, 5X, 6X, Cube, and all ArduPilot/PX4 autopilots
Technical Specifications
- GNSS Chip: Unicore UM982
- Compass: IST8310
- Weight: 37.9g (without antennas)
- Board Dimensions: 34.8 × 58.9 × 14.4mm
- Antenna Diameter: 27.5mm • Antenna Height: 59mm
- Constellations: GPS L1C/A/L2P/L2C/L5 • GLONASS L1/L2 • Galileo E1/E5a/E5b • BDS B1I/B2I/B3I • QZSS L1/L2/L5
- RTK Accuracy: H: 0.8cm+1ppm • V: 1.5cm+1ppm • Velocity: 0.03m/s
- DGPS Accuracy: H: 0.4m • V: 0.8m • Heading: 0.1°/1m baseline
- Single Point Accuracy: H: 1.5m • V: 2.5m
- Antenna Gain: 2dBi peak • LNA Gain: 33±2dB
- Time-To-First-Fix: Cold Start ≤30s • Hot Start ≤5s
- RTK Survey-In Time: ≤5 min @2.0m CEP
- Update Rate: 20Hz positioning, heading & raw data
- Baud Rate: 230400 bps (default, 5Hz); adjustable
- Working Voltage: 4.75–5.25V
- Current Consumption: ~350mA
- Antenna Connection: SMA female (board) / SMA male (antenna)
- Ports: GH 10P (Port 1) • USB Type-C (Port 2) • UART2 GH 6P (Port 3, RTCM input)
- Applications: Rover • Moving Baseline Rover • Base Station
Included Cables
- GH 10P cable — 150mm
- GH 10P cable — 400mm
- GH 10P to 6P cable — 300mm
Compatible Autopilots
- Pixhawk 4, 5X, 6X, 6C
- Cube Orange, CubeOrange+, Cube Blue
- All ArduPilot 4.4.0+ and PX4 1.14+ autopilots
What’s in the Box
- 1× H-RTK UM982 Module
- 2× High Precision Helical Antennas
- 2× Antenna Mounts
- 2× SMA Cables (40cm each)
- 2× 10-pin to 10-pin JST-GH Cables
- 1× 10-pin to 6-pin JST-GH Cable
- 1× 6-pin to 6-pin JST-GH Cable
Perfect For
- Large UAVs and VTOLs requiring compass-free yaw in high-interference environments
- Precision mapping and survey drones needing sub-centimeter RTK positioning
- Autonomous platforms with ArduPilot or PX4 autopilots
- Enterprise and defense UAV deployments where magnetic interference is a concern
For enterprise, government, or volume orders, contact us at sales@thedroneflight.com.
Shipping Policy
Estimated Delivery: Orders typically arrive within 3-7 business days to most locations in North America.
International Shipping: Available with tracking. Transit times vary by destination.
Return & Guarantee Policy
Return Policy: Defective or damaged item? Return it within 30 days for a full refund. Customer pays return shipping.
Technical Support: Need help with compatibility or setup? Contact our FPV experts for free assistance.
