The accuracy of Unicore GNSS receivers ranges all the way from meter, though sub-meter and centimeter, down to the millimeter level.

Using our own unique technology Unicore has successfully developed and fielded series of multi-system, multi-frequency, high-performance System on a Chip (SoC), and a range of high-precision, board-level GNSS receivers and navigation/timing modules.

Applications include Continuously Operating Reference System (CORS) reference stations, survey & mapping, precision agriculture, positioning & heading, vehicle monitoring, autonomous vehicle navigation, and precision timing – along with a number of other

Unicore is a one-stop provider of GNSS SoC chips and GNSS receivers, with extensive experience in the design, verification, development, implementation and production of highly integrated ICs, along with multi-system high-performance GNSS baseband algorit

Unicore Communications, Inc. is a technology company focused on the design & development of highly integrated ICs, algorithms and GNSS receivers.

Home > Product Center > CLAP-B7


High Precision GNSS/INS Board

Brief Introduction

ClapTM(Concurrent Localization & Attitude Pilot) is a high-precision multi-sensor fusion positioning and heading technology developed by Unicore Communications. By using the latest "CLAP" technology. Unicore has launched CLAP series products, characterized as the miniaturized and high-performance intergrated boards. Based on multi-mode and multi-frequency, dual-antenna positioning and orientation, high-precision GNSS board, and integrated MEMS intertial measurment unit, the CLAP series products provide low-latency, high precision three-dimensional position, velocity, attitude, IMU original acceleration and angular velocity measurement results. Even when the GNSS signal is completely blocked, the performance remains stabel and continuous, by combining the absolute accuracy of GNSS positioning and the reliability of inertial measurement.

The CLAP series products have the fucntions of moving base alignment, inertial/satellite combined navigation, independent zero speed correction, independent calibration and many more. It can be combined with the odomenter date to further improve the accuracy of vehicle navigation.

All the settings and data collection can be completed by using simple commands and data recording interface via the standard serial port. Once the hardware is installed, the system cna be set up within a few minutes

CLAP-B7 is a compact size, light wight, low power consumption, low cost, user-friendly intergration and mass production OEM board, designed for automatic driving, traverse measurement, unmanned serial vehicles and various attitude stabillization platforms.


• Compact size and high-performance integrated navigation board, dimension: 46×71×17.1 mm

• The best PPS output precision with 5 ns RMS in industry

• "WINS" optimized technology (Wheel INS) for vehicles, wheeled robots

• Combined algorithm of inertial/GNSS/odometer

• Built-in high performance and high precision GNSS board of Unicore

• 100 HZ positioning result/original IMU measurement output

• 20 HZ GNSS original measurement output

• BDS B1/B2 + GPS L1/L2 + GLONASS L1/L2 + Galileo E1/E5b signal tracking

• Dual-antenna/single antenna functionality

• 3.3~5V DC input

Data Manual

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Technical Index

Functional Ports

UART×3, Max: 921.6kbps Power status, GNSS status, INS status

Note: 1. All the indicators of IMU refer to the typical working conditions.

         2. Typical values. Performance specifications subject to GNSS system characteristics, US DOD operational degradation, ionospheric and tropospheric conditions, satellite geometry, baseline length, multipath effects and presence of international or unintentional interference soureces.

Physical Characteristics

Dimension 46×71×17.1 mm MTBF 30000 hours
Weight 22g Life 15 years

Environmental Specifications

Oprating temperature -25℃~85℃ Vibration 2g @ 5~2000Hz
Storage temperature -40℃~85℃ Shock 40 g/50 ms
Humidity 95% non-condensing    

Performance Specifications

Position Accuracy Single Point: 1.5 m
Time Accuracy 5 ns RMS, peak-to-peak 35 ns (24h)
SBAS: 80 cm Gyroscope Range±2000°/s
Biss instability (1б)8°/h
Angular random walk< 0.34°/√hrr
DGPS: 40 cm Accelerometer Range ± 40g
Biss instability (1б)< 0.1 mg
Velocity random walk 0.037m/s/√hrr
RTK: 1cm + 1 ppm    
Velocity Accuracy
0.02m/s RMS    
Position Accuracy
Outage Duration Positioning Mode Position Accuracy(m) Velocity Accuracy(m/s) Attitude Acuuracy(deg)
Time   Horizontal Vertical Horizontal Vertical Roll Pitch Heading
00 s RTK 0.02 0.03 0.02 0.03 0.1 0.1 0.15
10 s SP 1.50 2.0 0.02 0.03 0.1 0.1 0.15
RTK 0.50 0.6 0.12 0.18 0.2 0.2 0.35
  SP 2.0 3.0 0.12 0.18 0.2 0.2 0.35

Application Area