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Unicore UM440 High Precision GNSS Chipset


GPS/GLONASS/Galileo/BeiDou High Precision RTK Module



The Unicore UM440 high precision GNSS chipset is the low cost RTK module developed by Unicore Communications, targeting agriculture, drones, etc. By employing a single UC4C0 (432 channel tracking) baseband chip and a single RF chip and using single-sided SMD packaging, UM440 achieve cost effective performance. It can simultaneously track GPS L1 + GLONASS L1 + Galileo E1 + BeiDou B1. Under a 10 km baseline, UM440 can maintain excellent application experience in challenging environments such as urban canyons, by deploying anti-interference functions and an onboard MEMS device.


  • Supports GPS L1 + GLONASS L1 + Galileo E1 + BeiDou B1
  • 30 mm × 40 mm, high precision RTK module
  • Support antenna signal detection
  • 20 Hz RTK update rate
  • Adaptive recognition of RTCM input data format
  • On board MEMS integrated navigation, supports the improved U-Fusion integrated navigation algorithm
  • SMD packaging

Technical Specifications

Channels: 432
Galileo: E1
BeiDou: B1
SinglePoint Position (RMS): Horizontal – 1.5 m
Elevation – 3.0 m
DGPS (RMS): Horizontal – 0.4 m
Vertical – 0.8 m
RTK (RMS): Horizontal – 1 cm + 1 ppm
Vertical – 1.5 cm + 1 ppm
VelocityAccuracy (RMS): 0.03 m/s
TimeAccuracy (RMS): 20ns
HeadingAccuracy: 0.2°@ 1 mbaseline
Cold Start: <45 s
Initialization Time: <10 s (typical)
Reacquisition: <1 s
Dimensions: 30 mm x 40 mm x 4 mm
OperatingTemperature: -40 °C – +85 °C
StorageTemperature: -55 °C – +90 °C
Humidity: 95% non-condensing
Vibration: MIL-STD-810
Shock: MIL-STD-810


The UM440 high precision GNSS chipset from Unicore is available through TerrisGPS. Please use the Request Pricing form to contact us for further information.

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