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GRTK Introduction

GRTK is a dual-antenna high-precision differential positioning and directional module (Real Time Kinematics) independently developed by Blicube. A complete RTK system can be formed through two GRTK modules (one mobile terminal and one base station terminal).

The module is based on a new generation of high-performance GNSS SoC chip design,supports multi-system multi-frequency RTK positioning, supports dual-antenna high-precision orientation, and supports GPS&GLONASS&Beidou&Galileo&QZSS navigation and positioning. It is mainly for high-precision positioning and orientation requirements such as drones, robots and intelligent driving.

Figure 1.1 Physical image of GRTK centimeter-level positioning and orientation system

Performance

Item
Frequencies BDS B1I/B2I1
GPS L1/L2
GLONASS L1/L2
Galileo E1/E5b
QZSS L1/L2
Single Point Positioning (RMS) Horizontal:1.5m
Vertical:2.5m
DGPS (RMS) Horizontal:0.4m
Vertical:0.8m
RTK (RMS) Horizontal:1cm+1ppm
Vertical:1.5cm+1ppm
Heading Accuracy (RMS) 0.2 degree/1 m baseline
Velocity Accuracy (RMS) 0.03 m/s
Time Accuracy (RMS) 20 ns
Time to First Fix (TTFF) Cold start < 25 s
Initialization Time < 5s (typical)
Reacquisition < 1 s
Correction RTCM v2.3/3.0/3.2
Data Output NMEA-0183
Update Rate 20 Hz
Inertial Navigation Accuracy < 5% of distance travelled during GPS denied conditions
Working Temperature -20℃ to +85℃
Power Supply 5v to 35v
Power Dissipation ~2.5W

Physical size

Figure 1.2 Schematic diagram of physical size

Test Video

  • Unmanned vehicle automatic route mission measurement.

User Manual