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UM442 High Precision RTK Heading Module

Unicore UM442 High Precision GNSS Chipset

GPS/GLONASS/Galileo/BeiDou High precision RTK and Heading Module



The Unicore UM442 high precision GNSS chipsetisa cost efficientRTKand heading moduledevelopedbyUnicoreCommunications, Inc. By employingUnicore’s new generation SOC chip Nebulas-II1, the UM442 can simultaneously track GPS, GLONASS, Galileo and BeiDou. It also supports SBAS and QZSS.

Powered by Unicore “UGypsophila” RTK processing technology, the UM442 tracks more satellites and performs optimization on the multi-dimensional RTK matrix computation, resulting in much higher RTK processing capability.
UM442 has an onboard MEMS chip together with the U-Fusion integrated navigation algorithm. It can achieve accurate and reliable positioning and attitude sensing, even in the most challenging environments such as urban canyons, tunnels, etc.


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

Technical Specifications

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
Reacquisotion:< 1 s
VelocityAccuracy (RMS):0.03 m/s
TimeAccuracy (RMS):20ns
HeadingAccuracy:0.2°@ 1 mbaseline
Cold Start:<45 s
Initialization Time:<5 s (typical)
Dimensions:30 mm x 40 mm x 4 mm
Weight:8 g
OperatingTemperature:-40 °C – +85 °C
StorageTemperature:-55 °C – +90 °C
Humidity:95% non-condensing


The UM442 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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