SparkFun Triband GNSS RTK Breakout - UM980

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 can 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. This board allows you to pinpoint the X, Y, and Z location of any object within roughly the width of your fingernail. With an RTK solution, the module achieves a horizontal accuracy of about 8mm and vertical accuracy of 15mm. The UM980 supports both rover and base station operations.

Equipped with a rechargeable backup battery, the module retains the latest configuration and satellite data, enabling a 'warm-start' that significantly reduces the time-to-first-fix. The module's survey-in mode allows it to function as a base station, producing RTCM 3.x correction data. A secure SMA connector is provided for attaching a Triband GNSS antenna.

The UM980 module currently supports serial UART only. All three serial UART ports are accessible via a USB-C connector through CH340, a 4-pin locking JST connector, and a BlueSMiRF header. Unique pins are also available on the board's edge, with various jumpers included for configuring power and LEDs.

Features:

• 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 (with specific firmware) protocols over UART
• Integrated SMA connector for use with a multiband GNSS antenna of your choice
• Voltage: 5V or 3.3V, with all logic at 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: Real-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: 50.8mm x 50.8mm
• Weight: 13.8g

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

Documents:

• 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

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