UM4B0 User Manual
2
1.3
Technical Specifications
Table 1-1 Performance Specifications
Channels
432 channels, based on
NebulasII SoC
RTK Initialization Time
<5s (typical)
Frequency
GPS L1/L2/L5
BDS B1I/B2I/B3I/B1C/B2a
GLONASS L1/L2
Galileo E1/E5a/E5b
Qzss L1/L2/L5
Initialization
Reliability
>99.9%
Single Point
Positioning
Horizontal: 1.5m
Cold Start
<25s
Vertical: 2.5m
Reacquisition
<1s
DGPS(RMS)
Horizontal: 0.4m
Correction
RTCM 3.0/3.2/3.3
Vertical: 0.8m
RTK(RMS)
Horizontal: 1cm+1ppm
Data Output
NMEA-0183, Unicore
Binary
Vertical: 1.5cm+1ppm
Update Rate
20Hz
Heading Accuracy
(RMS)
0.2 degree@1 m baseline
Time Accuracy (RMS)
20ns
Velocity Accuracy
(RMS)
0.03m/s
Power Consumption
1.8W
Dimension
30×40×4 mm
Table 1-2 Functional Ports
3x UART, 1xI2C, 1x SPI (LV-TTL)
1x1PPS
（
LV-TTL
）
1x Event input
1.4
Interfaces
RF in
RF
Fron
tend
SAW
Filter
Nebulas-II
UART
SPI
GPS
BDS
GLO
GAL
SBAS
Interface
Event
TCXO
I2C
ANT_PWR
PPS
Figure 1-2 Block Diagram
