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Holybro H-RTK Unicore UM982 High-Precision GPS Dual Antenna

Name: Holybro H-RTK Unicore UM982 High-Precision GPS Dual Antenna - Flying Tech
Brand: Holybro
SKU: GPS-HB-H-RTK12036
Price: 479.99 GBP
Availability: InStock

£479.99 Inc. VAT

Magnetometers are prone to interference, enter the UM982. It offers compass-less YAW data to the autopilot.

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SKU: GPS-HB-H-RTK12036 Categories: High Precision GPS (RTK), Electronics, GPS & Compass Modules, Compass Modules Tags: Compass, F9P, GPS, Magnetometer, RTK

Description

The Holybro UM982 Dual Antenna RTK GPS provides high-precision positioning information and is capable of generating non-magnetometer moving baseline yaw determinations for autopilots with one single GPS module.

One of the best applications of this GPS is to provide compass-less YAW information to the autopilot (commonly called GPS Heading or Moving Baseline Yaw). Using this GPS as a yaw source prevents magnetic interference from the vehicle motors and electrical systems and any environmental interference sources, such as metallic structures or equipment, that can cause incorrect yaw reports to the autopilot.

This works even if the GPSs are not receiving RTCM data from a fixed RTK station or NTRIP server. The device is based on the Unicore UM982 NMEA GNSS module and supports RTK positioning adjustment for centimeter-level accuracy, GPS/GLONASS,Beidou, Galileo, and QZSS global positioning systems.

It also includes a magnetometer, LED, and safety switch button. It also serves as an RTK-corrected vehicle GPS, with or without moving baseline yaw determination, and as a base station GPS for sending RTCM data to a ground control station to provide an RTK source for the vehicle via telemetry.

Features

Dual antennas allow Moving Baseline Yaw (GPS Heading) with just one module
Can replace the traditional compass/magnetometer
Perfect for system/environment with high magnetic interference
Excellent RTK performance

For other technical detail and setup guide, please refer to the Holybro Documentation Page

Specification

Application: Rover, Base, Moving Baseline Rover
GNSS:
- BDS B1I/B2I/B3I
- GPS L1C/A/L2P (Y)/L2C/L5
- GLONASS L1/L2
- Galileo E1/E5a/E5b
- QZSS L1/L2/L5
Antennas Peak Gain (MAX): 2dBi
LNA Gain (typical): 33±2dB
Time-TO-First Fix:
- Cold start: ≤ 30s
- Hot start: ≤ 5s
RTK-SurveyIn-Time: ≤5 minute @2.0mCEP
Data and Update Rate:
- 20 Hz Positioning & Heading
- 20 Hz Raw Data observation
Port
- Port 1: GH1.25 10-pin
- Port 2: USB Type-c Port 3: UART 2 (GH1.25 6pin)
Cable Length
- GH 10P: 150mm
- GH 10P: 400mm
- GH 10P to 6P: 300mm
Antenna Connection Type
- Board: SMA female
- Antenna: SMA male
Baud rate: (Adjustable): 230400 5Hz default
Working voltage: 4.75V~5.25V
Current Consumption: ~350mA
Dimensions
- Board: 34.8*58.9*14.4mm
- Antenna Diameter: 27.5mm
- Antenna height: 59mm
Weight: 37.9g (without antennas)

Included:

1x H-RTK UM982
2x High Precision Helical Antennas
2x Antenna Mounts
2x SMA Cables
2x 10pin – 10pin JST-GH Cables
1x 10pin – 6pin JST-GH Cable
1x 6pin – 6pin JST-GH Cable

Q&A

Questions and answers of the customers

Hi, I am planning to buy two set of this heading units for our autonomous project , I need one to be used as base ( receiving N trip correction and giving out correction through Lora radio units), another one used as Rover (both can record/gives position and heading accurately). I don't know what's the different of this module and this slightly expensive one: Holybro H-RTK mosaic-H (Dual Antenna Heading). What do I need to buy to build RTK GPS set up. what control software and data collecting software this two module uses, is it a Mobile app or need a laptop for each unit (base and rover). Many thanks.

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Q Hi, I am planning to buy two set of this heading units for our autonomous project , I need one to...... Read more answer now
A
The UM982 uses a Unicore GNSS chipset and is a cost-effective dual-antenna RTK module. The mosaic-H is built on Septentrio’s industrial-grade chipset, offering stronger multipath rejection, better heading accuracy at low speeds, and a built-in web interface that simplifies configuration and monitoring.

To build an RTK setup, you’ll need two modules (one base, one rover), dual-band GNSS antennas for each, and telemetry radios (e.g., LoRa) to send RTCM corrections from base to rover. Both modules require configuration over USB or serial.

Software Setup & Integration:

For the UM982, use a USB/serial terminal like SerialTool or U-Center to configure GNSS settings, select output formats (e.g., NMEA or UBlox binary), and enable correction streams.

For the mosaic-H, configuration is typically done via its built-in web interface, accessible over USB or Ethernet. Septentrio also offers advanced logging and update tools.

Autopilot Integration:

After initial configuration, both modules can be connected to flight controllers running ArduPilot or PX4.

If you’re using Mission Planner (ArduPilot), it can handle GPS input and also inject NTRIP corrections directly to the rover via telemetry.

If you’re using QGroundControl (PX4), it will display RTK status, heading, and positioning data. QGC can also handle NTRIP correction injection if the base station is online.

Neither module relies on a mobile app—setup requires a laptop or companion computer for configuration and monitoring.

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Holybro H-RTK Unicore UM982 High-Precision GPS Dual Antenna

Questions and answers of the customers