Command and Log Reference
28
40
CMRDESC
COM1
COM2
COM3
0.05
、
0.1
、
0.2
、
0.5
、
1
、
5
、
10
……
Base station description
6.1.1
GNGGA GNSS Multi-System Positioning Output
This command is used to log time, multi-system positioning fix data of the receiver.
The message begins with GNGGA.
Recommend Input:
Output 1Hz GNGGA message from current serial port:
GNGGA 1
Output 1Hz GNGGA message from COM2:
GNGGA COM2 1
LOG output:
$GNGGA,025754.00,4004.74102107,N,11614.19532779,E,1,18,0.7,63.
3224,M,-9.7848,M,00,0000*58
Table 6-2: GNGGA Message Description
ID
Field
Description
Symbol
Example
1
$GNGGA
Log header
$GNGGA
2
utc
UTC time of the current position
(hours/minutes/seconds/
decimal seconds)
hhmmss.ss
170659.00
3
lat
Latitude (DDmm.mm)
IIII.II
4001.1220
4
lat dir
Latitude direction (N = North, S = South)
a
N
5
lon
Longitude (DDDmm.mm)
yyyyy.yy
11600.3622
6
lon dir
Longitude direction (E = East, W = West)
a
E
7
GPS quality
Quality indicators of positioning results:
0 = Positioning not available or invalid
1 = Single point
2 = Pseudorange differential or SBAS
4 = RTK fixed solution
5 = RTK floating solution
6 = INS
7 = User fixed position
x
1
8
# sats
Number of satellites in use, may not the
same as the number in view.
xx
10
9
hdop
Horizontal dilution of precision
x.x
1.0
10
alt
Antenna height, above/below the mean x.x
1098.44
