CSI Wireless Seres, Reference Manual

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Seres Reference Manual
77
5.7.1 GGA Data Message
The GGA message contains detailed GPS position information, and is the
most frequently used NMEA data message. In Table 5-7, the GGA data
message is broken down into its components. This message takes the
following form:
$GPGGA,hhmmss.ss,ddmm.mmmm,s,dddmm.mmmm,s,n,qq,pp.p,s
aaaaa.aa,M,
±
xxxx.xx,M,sss,aaaa*cc<CR><LF>
Table 5-7 GGA Data Message Defined
Field Description
hhmmss.ss UTC time in hours, minutes, seconds of the GPS position
ddmm.mmmmm Latitude in degrees, minutes, and decimal minutes
s s = N or s = S, for North or South latitude
dddmm.mmmmm Longitude in degrees, minutes, and decimal minutes
s s =E or s = W, for East or West longitude
n Quality indicator, 0 = no position, 1 = undifferentially corrected position, 2 =
differentially corrected position, 9= position computed using almanac
qq Number of satellites used in position computation
pp.p HDOP =0.0 to 9.9
saaaa.aa Antenna altitude
M Altitude units, M = meters
±
xxxx.xx Geoidal separation (needs geoidal height option)
M Geoidal separation units, M = meters
sss Age of differential corrections in seconds
aaa Reference station identification
*cc Checksum
<CR><LF> Carriage return and line feed