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UR4B0 is a new generation, multi-system and multi-frequency high precision CORS receiver supporting triple-frequency BDS navigation satellite system. It is based on Unicore multi-system, multi-frequency and high performance GNSS SoC – Nebulas-II™ and features millimeter level carrier phase observation, large memory, multiple communication interfaces and protocols. It is especially suitable for surveying, meteorology, earthquake and deformation monitoring, scientific research and other high precision measuring and positioning fields.


Product Features

  • Supports BDS BD3 signal

  • Supports GPS L1/L2/L5 + BDS B1/B2/B3 + GLONASS L1/L2 + Galileo E1/E5a/E5b + QZSS L1/L2/L5

  • Millimeter level carrier phase observation

  • Built-in 32G memory

  • Supports FTP server and FTP push file transfer

  • Supports NTRIP real time data streams

More suitable for CORS

  • Stable and reliable

  • Full constellation and full frequency

Customized services

  • Support customized protocol

  • Rich application experience

Easy to use

  • Support friendly webUI and LCD

  • Provide standard and optional accessories

Technical Specifications

Performance Specifications

432 channels,
based on Nebulas II GNSS SoC
FrequencyGPS L1/L2/L5
BDS B1/B2/B3
Galileo E1/E5a/E5b
Single Point Position (RMS)Horizontal: 1.5 m
Vertical: 3.0 m
StaticHorizontal: 2.5 mm + 1 ppm
Vertical: 5.0 mm + 1 ppm
RTKHorizontal: 10 mm + 1 ppm
Vertical: 15 mm + 1 ppm
Measurement Precision(RMS)Code: 10 cm
Carrier Phase: 1 mm
Time to First Fix (TTFF)Cold Start: 50 s
Reacquisition1 s
Initalization Time10 s(typical)
Initalization Reliability99.9%
CorrectionRTCM 2.x/3.x, CMR
Data OutputNMEA-0183,UNICORE
Update Rate20 Hz(optional)
Time Accuracy (RMS)20 ns
Velocity Accuracy (RMS)0.03 m/s
Control InterfaceWEB、Uprecise
Network ProtocolNTRIP、HTTP、FTP

Physical Specifications

Dimensions222 × 164 × 79 mm
Weight1.8 Kg

Power Input

12 VDC± 10%

Environmental Specifications

Relative humidity,95% non-condensing

External Oscillator Input

ConnectorBNC(F),50 Ω
External Clock Input Frequency10 MHz
Signal Level0 dBm ~ 10 dBm

RF Input/LNA Power Output

Antenna ConnectorTNC,50 Ω
Acceptable RF Input Level
-80 dBm ~ -105 dBm
LNA4.75 ~ 5.10 V, 0 ~ 100 mA

Functional Ports

Serial Port1* RJ45
Ethernet1* SMA
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Comprehensive product feature specifications.

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