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Unicore UB4B0 GNSS RTK Board


GPS/GLONASS/Galileo/BeiDou All Constellation Multi-Frequency High Precision GNSS RTK Board



The Unicore UB4B0 GNSS RTK board is the first system-wide GNSS high-precision board based on the new-generation Nebulas-II high-performance SoC chips developed by Unicore Communications. It supports multiple satellite navigation systems and triple-frequency RTK technology including GPS, GLONASS, Galileo, BeiDou, SBAS and QZSS, for high-precision positioning, navigation and mapping, etc.


  • Brand-new Nebulas-II high-performance SoC chips
  • Independent positioning of any system and combined positioning of multiple systems
  • Supports advanced multi-path resistance technology and low-elevation tracking technology
  • Centimeter-level high precision RTK positioning
  • Supports serial ports, ethernet, 1PPS, external clock input, etc.
  • Supports CAN and odometer inputs


  • 432 channels and specific fast acquisition engines
  • Supports GPS, GLONASS, Galileo, BeiDou, SBAS and QZSS
  • Self-adaptive anti-narrowband interference rejection can reach 60dB

Technical Specifications

Channels: 432
GPS: L1, L2, L5
Galileo: E1, E5a, E5b
BeiDou: B1, B2, B3
QZSS: L1, L2, L5
SinglePoint Position (RMS): Horizontal – 1.5 m
Vertical: 3.0 m
RTK (RMS): Horizontal – 1 cm + 1 ppm
Vertical – 1.5 cm + 1 ppm
ColdStart: < 45 s
HotStart: < 10 s
Reacquisition: < 1 s
InitiationTime: < 10 s(Typical)
DataUpdateRate: 20 Hz
PositioningUpdateRate: 20ns
TimeAccuracy (RMS): 0.03 m/s
Dimensions: 100 mm x 60 mm x 11.4 mm
Weight: 45 g
OperatingTemperature: -40 °C – +85 °C
StorageTemperature: -55 °C – +95 °C
Humidity: 95% non-condensing
Vibration: MIL-STD-810
Shock: MIL-STD-810

Evaluation Kit



The UB4B0 high precision GNSS RTK board from Unicore is available through TerrisGPS. Please use the Request Pricing form to contact us for further information.

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Client Testimonials

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"Thank you for your prompt service. All seems to be working well again. Your techs were very helpful with the troubleshooting."
J.O. - Ground Navigation
"Thanks for all the troubleshooting help, also to John for his assistance and the prompt answers from you guys!"
F.A. - Survey Industry

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