MTD2000 AT Command Guide R12
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26.1.2
GGA – Global Positioning System Fix Data
It is to show the time, position and fix related data for a GPS receiver.
Syntax:
$GPGGA,hhmmss.dd,xxmm.dddd,<N|S>,yyymm.dddd,<E|W>,v,ss,d.d,h.h,M,g.
g,M,a.a,xxxx*hh<CR><LF>
Hhmmss.dd
UTC time
hh = hours
mm = minutes
ss = seconds
dd = decimal part of seconds
xxmm.dddd
Latitude
xx = degrees
mm = minutes
dddd = decimal part of minutes
<N|S>
Either character N or character S, ( N = North, S = South )
yyymm.dddd
Longitude
yyy = degrees mm = minutes
dddd = decimal part of minutes
<E|W>
Either character E or character W, E = East, W = West
V
Fix valid indicator
0 = Fix not valid
1 = Fix valid
Ss
Number of satellites used in position fix, 00-12. Fixed length
d.d
HDOP – Horizontal Dilution Of Precision
h.h
Altitude (mean-sea-level, geoid)
M
NULL (missing)
g.g
NULL (missing)
M
NULL (missing)
a.a
NULL (missing)
Xxxx
NULL (missing)
Example:
$GPGGA,084053.39,6016.3051,N,02458.3735,E,0,00,0.0,46.6,M,18.2,M,,*5D
26.1.3
GSA – DOP and Active Satellites
It is to show the GPS receivers’ operating mode, satellites used in the navigation solution
reported by the GGA sentence, and DOP values.
Syntax:
$GPGSA,a,b,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,p.p,h.h,v.v*hh<CR><LF>
a
Mode:
M = Manual, forced to operate in 2D or 3D mode.
