Specifications

Open CTM (Revision D)

157

Report Messages

nnnnn is the PAD port number

bbbbbb is the serial port’s baud rate

ttt is the PAD type, UDP or TCP

Example:

ID=7788282538,5005,9600,UDP

9.8 Message Type 80, $GPGGA

Standard NMEA message containing time, GPS latitude and longitude, satellite status information and

altitude.

Message format is: $GPGGA,hhmmss.ss,llll.llll,a,yyyyy.yyyy,b,c,d,ee.e,sfffff,M,,M,,0000*hh<CR><LF>

Where:

hhmmss.ss is the UTC time in hours, minutes, seconds, and decimal seconds

llll.llll is the position latitude in degrees, minutes and decimal minutes

a is N(orth) or S(outh)

yyyyy.yyyy is the position longitude in degrees, minutes and decimal minutes

b is E(ast) or W(est)

c is the GPS quality: 0 = not valid; 1 = valid

d is the number of satellites in use (range 0 to 12)

ee.e is the Horizontal Dilution of Precision (HDOP)

s is sign + or – for altitude above or below mean sea level

fffff is the altitude in metres

hh is the message checksum

Example:

$GPGGA,000512.00,4910.9588,N,12254.6560,W,1,8,01.1,-00015,M,,M,,0000*5C

9.9 Message Type 82, GPRMC

Standard NMEA message containing time, GPS latitude and longitude, speed, altitude and heading

information.

NMEA 0183 v2.0 message format is:

$GPRMC,hhmmss.ss,v,llll.llll,a,yyyyy.yyyy,b,ccc.c,ddd.d,ddmmyy,,*hh<CR><LF>

NMEA 0183 v3.0 message format is:

$GPRMC,hhmmss.ss,v,llll.llll,a,yyyyy.yyyy,b,ccc.c,ddd.d,ddmmyy,,,e*hh<CR><LF>