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3
Velocity Accuracy
(RMS)
0.1m/s(Dual system horizontal, open sky)
Sensitivity
4
GN
BDS
GPS
GLONASS
Tracking
-161dBm
-159dBm
-161dBm
-158dBm
Acquisition -147dBm
-144dBm
-147dBm
-142dBm
Hot Start
-154dBm
-149dBm
-154dBm
-148dBm
Reacquisi-
tion
-157dBm
-156dBm
-157dBm
-153dBm
1PPS(RMS)
5
20ns
Data Update Rate
1Hz
Data Output
6
NMEA 0183
,
Unicore Protocol
1.3
Interface
GNSS IC
LNA
SAW
TCXO
Battery
RTC
Crystal
RESET_N
UART
PPS
UM
2
2
0
-I
V
NV
Figure 1-2 Structure Chart
UART
UM220-IV NV-GN module COM1 is the primary serial port, which supports data transfer
and firmware upgrade function. The signal input/output level is LVTTL. The default baud
rate varies according to the version of firmware, and the baud rate can be configured up
4
When C/N0 is 41db
5
1 hour statistics, timing is not recommended
6
Configurable, refer to
UFirebird_Standard Positioning Products Protocol Specification
for details