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 controllers with a single GPS module. One of the best applications of this GPS is to provide compass-less YAW information to the controller (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 controller. 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 indicators, and a safety 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. (More info) Features Dual antennas allow Moving Baseline Yaw (GPS Heading) with just one module Can replace the traditional compass/magnetometer Perfect for a system/environment with high magnetic interference Excellent RTK performance Tips: It is recommended to use the H-RTK F9P-Base or F9P Helical as your base station because it's a simple setup procedure in Mission Planner & QGroundControl. Currently, QGC cannot configure the UM982 automatically as a base station; additional manual setup is required. Specification Product UM982 Application Rover Moving Baseline Rover Base Station (Recommend using H-RTK F9P-Base as a base station) Compass IST8310 GNSS BDS B1I/B2I/B3I GPS L1C/A/L2P (Y)/L2C/L5 GLONASS L1/L2 Galileo E1/E5a/E5b QZSS L1/L2/L5 RTK Accuracy (RMS) Horizontal: 0.8cm + 1ppm Vertical: 1.5cm + 1ppm Velocity: 0.03 m/s DGPS Accuracy (RMS) Horizontal: 0.4 m Vertical: 0.8 m Heading: 0.1°/1 m baseline Single Point Positioning Accuracy (RMS) Horizontal: 1.5m Vertical: 2.5m Antennas Peak Gain (MAX) 2.5dBi 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 40.3g (without antennas) User Guide & Download For other technical details and setup guides, please refer to the Holybro Documentation Page Setup & Getting Started (Ardupilot) Setup & Getting Started (PX4) Pinout Dimension Uprecise Download Firmware supports details Package Included: 1x H-RTK UM982 2x High Precision Helical Antennas 2x Antenna Mounts 2x SMA Cables (40cm) 2x 10pin - 10pin JST-GH Cables 1x 10pin - 6pin JST-GH Cable 1x 6pin - 6pin JST-GH Cable Accessories 30° Antenna Mount Antenna Extension Cable GPS Extension Cable
