User's Manual

VT-M2M-TC VM
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4GPSModule
4.1GetGPSData
Open/dev/ttyS2,readGPSdata
$sudo./gps38400/dev/ttyS2
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4.2  GPSDataFormat
4.2.1GPGGA
GlobalPositioningSystemFixData
Name ExampleData Description
SentenceIdentifier $GPGGA GlobalPositioningSystemFixData
Time 170834 17:08:34Z
Latitude 4124.8963,N 41d24.8963'Nor41d24'54"N
Longitude 08151.6838,
W
81d51.6838'Wor81d51'41"W
FixQuality:
‐0=Invalid
‐1=GPSfix
‐2=DGPSfix
1 DataisfromaGPSfix
NumberofSatellites 05 5Satellitesareinview
HorizontalDilutionofPrecision
(HDOP)
1.5 Relativeaccuracyofhorizontalposition
Altitude 280.2,M 280.2metersabovemeansealevel
HeightofgeoidaboveWGS84
ellipsoid
‐34.0,M‐34.0meters
TimesincelastDGPSupdate blank Nolastupdate
DGPSreferencestationid blank Nostationid
Checksum *75 Usedbyprogramtocheckfortransmission
errors
ex:$GPGGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx
hhmmss.ss=UTCofposition
llll.ll=latitudeofposition