Neoway G2 Series - Field Type

G2 & G7A
Commands Manual
Copyright © Neoway Technology Co., Ltd
4
vary with the system identifier.
NMEA4.0 and Earlier Versions
NMEA4.1
GGA
[1]Identifier
[1]Identifier
ZDA
[1]Identifier
[1]Identifier
GLL
[1]Identifier
[1]Identifier
RMC
[1]Identifier
[1]Identifier
VTG
[1]Identifier
[1]Identifier
GSA
[2]Identifier
[1] Identifier, additional fields are used to identify
different GNSS constellations.
GSV
[2]Identifier
[2]Identifier
[1]Identifier: If satellites of only one GNSS constellation are used to calculate locations, the
transmission identifier is BD, GP, GL, or GA. If satellites of multiple GNSS constellations are used
to fix the position, the transmission identifier is GN.
[2]Identifier: GP (GPS), BD (BDS ), GL (GLONASS)
G2 and G7A receivers support three versions of the NMEA0183 protocol.
NMEA 2.2 is different from 2.3/4.0 in the following items:

Mode is not output in GLL, RMC, and VTG sentences.

In GGA sentence, the quality indicator (FS) is displayed as 1 for both estimated mode and SPS
mode. In NMEA 2.3/4.0, this field is displayed as 6 for estimated mode.
NMEA 4.1 added some fields compared to NMEA 4.0:

systemId in GSA sentence

signalId in GSV sentence

navStatus in RMC sentence
For details, see 5 Input Messages (Custom NMEA Sentences) .
3.4 Field Type
Field Type
Symbol
Definition
Special Format Fields