Overview:

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.

Note: The Status LED driver has changed. This LED is supported in PX4 1.14, ArduPilot 4.4.0 & later.

 

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

Tips: It is recommended to use the H-RTK F9P-Base F9P Helical as your base station because it's a simple setup procedure in Mission Planner & QGroundControl. Neither MP nor QGC can configure the UM982 automatically as a base station at this moment, additional manual setup is required.

 

Specification:

Product


UM982

Application

  • Rover
  • Moving Baseline Rover
  • Base Station (H-RTK F9P Recommended)

GNSS

  • BDS B1I/B2I/B3I
  • GPS: L1C/A/L2P  (Y)/L2C/L5
  • Galileo E1/E5a/Eb5
  • GLONASS: L1, L2
  • QZSS: L1C/A, L1C/B, L2

Compass 


IST8310

RTK Accuracy (RMS)

 Horizontal:

  0.8cm + 1ppm

Vertical:

  1.5cm + 1ppm

Velocity:

  0.03 m/s

DGPS Accuracy (RMS)

Horizontal:

  0.4m

Vertical:

  0.8 m

Heading:

  0.1°/1 m baseline

Single Point Positioning Accuracy (RMS)


Horizontal:  1.5
0m

Vertical: 2.50m

Antennas Peak Gain (MAX)


2dBi

LNA Gain 33±2dB

Antennas Peak Gain (MAX)


2dBi

Time-TO-First Fix


Cold start: ≤ 30s
Hot start: ≤ 5s

RTK-Survey In-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

Power Consumption


~350mA

Operating Temperature


-40℃ to 85℃

Dimension


Board: 34.8*58.9*14.4mm
Antenna Diameter: 27.5mm
Antenna height: 59mm

Weight


37.9g (without antennas)

 

Package Includes:

  • • 1x H-RTK UM982
  • • 2x High Precision Helical Antenna
  • • 2x Antenna Mounts
  • • 2x SMA Cable(40CM)
  • • 2x 10Pin - 10Pin JST-GH Cables
  • • 1x 10Pin - 6Pin JST-GH Cable
  • • 1x 6Pin - 6Pin JST-GH Cable

 

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