Veripos LD8 - GGA Sentence

Reference Information
LD8 Operations Manual AB-V-MA-00635_RevA2 28
5.2.2 GGA SENTENCE
The NMEA GGA sentence contains time and position fix related data for a GPS system. It includes basic
quality information, which is limited to ‘Fix Quality’, ‘Number of Satellites in Use’, ‘HDOP’ and ‘Age of
Differential GPS Data’.
GGA SENTENCE STRUCTURE & EXAMPLE
$GPGGA,
hhmmss.ss,
ddmm.mmmmm,
a,
dddmm.mmmmm,
b,
q,
xx,
p.p,
a.b,
M,
c.d,
M,
x.x,
nnnn
*hh
$GPGGA,
123519.00,
4807.03787,
N,
01131.00547,
E,
1,
15,
0.9,
545.4,
M,
46.9,
M,
14.0,
0281
*47
GGA SENTENCE DEFINED
GGA
Global Positioning System Fix data
hhmmss.ss
UTC of position
ddmm.mmmmm
Latitude of position
a
N or S, latitude hemisphere
dddmm.mmmmm
Longitude of position
b
E or W, longitude hemisphere
q
GPS Quality indicator (0 = invalid, 1 = GPS SPS, 2 = DGNSS fix, 4 = Fixed RTK, 5 =
Float RTK / PPP, 6 = Dead Reckoning), 7 = Manual Input Mode, 8 = Simulation Mode
xx
Number of satellites in use
p.p
HDOP (Horizontal dilution of precision)
a.b
Antenna altitude above/below mean-sea-level
M
Units of antenna altitude, meters
c.d
The relationship between the geoid and the WGS84 ellipsoid
M
Units of meters
x.x
Age of differential GNSS data
nnnn
Differential reference station ID, 0000 to 1023
*hh
Checksum
[CR][LF]
Sentence Terminator
NOTE
The number of decimal places in the GGA message Latitude and Longitude values is configurable,
see section GGA Precision Selection for details. If making changes from 5 decimal places the
sentence will no longer conform with NMEA v3.01.