John Deere OMPC20964 - Manual (Page 26)

GS2 Display—StarFire iTC
OUO6050,0000ED9 –19–07NOV07–3/4
RMC - NMEA has its own version of essential gps pvt
(position, velocity, time) data. It is called RMC, The
Recommended Minimum, which will look similar to:
RMC String Example
$GPRMC,123519,A,4807.038,N,01131.000,
E,022.4,084.4,230394,003.1,W*6A
Where:
RMC Recommended Minimum sentence C
123519 Fix taken at 12:35:19 UTC
A Status A=active or V=Void.
4807.038,N Latitude 48 deg 07.038’ N
01131.000,E Longitude 11 deg 31.000’ E
022.4 Speed over the ground in knots
084.4 Track angle in degrees True
230394 Date - 23rd of March 1994
003.1,W Magnetic Variation
*6A The checksum data, always begins with *
VTG - Velocity made good. The gps receiver may use the
LC prefix instead of GP if it is emulating Loran output.
VTG String Example
$GPVTG,054.7,T,034.4,M,005.5,N,010.2,K*33
where:
VTG Track made good and ground speed
054.7,T True track made good (degrees)
034.4,M Magnetic track made good
005.5,N Ground speed, knots
010.2,K Ground speed, Kilometers per hour
*33 Checksum
ZDA - Data and Time
ZDA String Example
$GPZDA,hhmmss.ss,dd,mm,yyyy,xx,yy*CC
$GPZDA,201530.00,04,07,2002,00,00*6E
15-18
121907
PN=26
Continued on next page