The SparkFun Triband GNSS RTK Breakout features the UM980 GNSS high precision RTK position module from Unicore Communications. The UM980 is a 1408-Channel GNSS Receiver based on the Nebulas IV™ that is able to simultaneously track GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5a/E5b/E6, Beidou B1I/B2I/B3I/B1C/B2a/B2b, QZSS L1/L2/L5, and SBAS. With this board, you will be able to know where your (or any object's) X, Y, and Z location is within roughly the width of your fingernail. When an RTK solution is reached, the module can achieve a horizontal accuracy of about 8mm (~0.3 inches) and vertical accuracy of 15mm (~0.59 inches). The UM980 is capable of both rover and base station operations.

We've included a rechargeable backup battery to keep the latest module configuration and satellite data available. This battery helps 'warm-start' the module, decreasing the time-to-first-fix dramatically. This module features a survey-in mode, allowing the module to become a base station and produce RTCM 3.x correction data. A SMA connector is included for a secure connection to a Triband GNSS antenna.

Currently, serial UART is only supported on the UM980 module. All three serial UART ports have been broken out to the USB-C connector via CH340, 4-pin locking JST connector, and BlueSMiRF header. Unique pins have also been broken out to the edge of the board. Various jumpers are also included to configure power and LEDs.

• Module has a typical low power-consumption of ~480mW
• 1408-Channel GNSS Receiver based on the Nebulas IV™
• Concurrent reception of GPS, GLONASS, Galileo, BeiDou, QZSS
  • GPS: L1C/A, L1C^*, L2P(Y), L2C, L5
  • GLONASS: L1, L2
  • Galileo: E1, E5a, E5b, E6^*
  • Beidou: B1I, B2I, B3I, B1C, B2a, B2b^*
  • QZSS: L1, L2, L5
  • SBAS
• Horizontal Accuracy
  • Autonomous: 1.5m
  • DGPS: 0.4m
  • RTK: 0.8cm + 1ppm
• Vertical Accuracy
  • Autonomous: 2.5m
  • DGPS: 0.8m
  • RTK: 1.5cm + 1ppm
• 50Hz Data Update Rate^*
• Time-To-First-Fix:
  • Cold: 30s
  • Warm: 20s
  • Hot: 5s
• CoCom Limits
  • Max Altitude: 18000m
  • Max G: <5G
  • Max Velocity: 515m/s
• Velocity Accuracy (RMS): 0.03m/s
• Time Accuracy (RMS): 20ns
• Supports NMEA, RTCM, and Unicore (w/ specific firmware) protocols over UART
• Integrated SMA connector for use with multiband GNSS antenna of your choice
• Voltage: 5V or 3.3V but all logic is 3.3V
• USB Type C Connector
• ESD Protection Diodes for USB Data Lines
• Built-in Resettable PTC Fuse 6V/1.5A
• CH340 USB-to-serial converter on UART1 Port
• Locking JST Connector for UART2 Port
• BlueSMiRF Footprint for UART3 Port
• Backup Battery for Hot Start
• LEDs
  • PWR: Power Indicator
  • PVT: Position, Voltage, Time
  • PPS: Pulse-Per-Second Indicator
  • RTK: Reak-Time-Kinematic Fixed Solution Indicator
• Jumpers
  • SHLD: USB Shield
  • VSEL: Voltage Select for Locking JST Connector Port
  • PWR: Power LED
  • PVT: Position, Voltage, Time LED
  • PPS: Pulse-Per-Second LED
  • RTK: Real-Time Kinematic LED
  • BT-VCC: Voltage Select for Bluetooth Port
  • VANT: Voltage Antenna Select
• Dimensions: 2.0in. x 2.0in. (50.8mm x 50.8mm)
• Weight: 13.8g

^{*: Items marked with * are only supported by specific firmware.}

• Schematic
• KiCad Files
• Board Dimensions
• Hookup Guide
• Unicore Communications UM980
  • General Specifications
  • Datasheet
  • User Manual
  • Reference Commands Manual
  • UPrecise Software
  • UPrecise User Manual
• CH340 Drivers
• SparkFun RTK
• Arduino Library
• GitHub Hardware Repo