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Unicore UM4B0 GNSS RTK Module


GPS/GLONASS/Galileo/BeiDou Multi-frequency High-precision GNSS RTK Module



The Unicore UM4B0 high precision GNSS RTK module is a positioning and RTK module developed by Unicore Communications, targeting autonomous vehicles, GIS, etc.

By employing a single UC4C0 (432 channel tracking) baseband chip, a single RF chip and using single-sided SMD packaging, the UM4B0 is able to able to maintain the smallest form factor for heading and positioning solutions. It can simultaneously track GPS L1/L2/L5 + GLONASS L1/L2 + Galileo E1/E5a/E5b + BeiDou B1/B2/B3. It can maintain position in the most challenging environments such as urban canyons, by deploying anti-interference and the onboard MEMS device.


  • Supports GPS L1/L2/L5 + GLONASS L1/L2 + Galileo E1/E5a/E5b + BeiDou B1/B2/B3
  • Based on 432 channel Nebulas II GNSS SoC
  • 30mm x 40 mm, smallest multi-system multi-frequency high precision module
  • 20 Hz RTK update rate
  • Supports odometer input/li>
  • SMD packaging

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
DGPS (RMS): Horizontal – 0.4 m
Vertical – 0.8 m
RTK (RMS): Horizontal – 10 mm + 1 ppm
Vertical – 15 mm + 1 ppm
VelocityAccuracy (RMS): 0.03 m/s
TimeAccuracy (RMS): 20ns
Initialization Time: <5 s (typical)
Cold Start: <25 s
Reacquisition: <1 s
Dimensions: 30 mm x 40 mm x 4 mm
Weight: 8 g
OperatingTemperature: -40 °C – +85 °C
StorageTemperature: -55 °C – +95 °C
Humidity: 95% non-condensing
Vibration: MIL-STD-810
Shock: MIL-STD-810

Evaluation Kits



The UM4B0 high precision GNSS RTK module from Unicore is available through TerrisGPS. Please use the Request Pricing form to contact us for further information.

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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."
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