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Nmea strings – John Deere OMPC20964 User Manual

Page 24

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GS2 Display—StarFire iTC

OUO6050,0000ED9

–19–07NOV07–1/4

NMEA Strings

NMEA String Data – Utilizing a third party GPS receiver or
utilizing a StarFire iTC

National Marine Electronics Association (NMEA) has
developed a specification that defines the interface
between various pieces of electronic equipment.

One of the most important NMEA sentences include the
GGA which provides the current Fix data, the RMC which
provides the minimum GPS sentences information, and
the GSA which provides the Satellite status data.

GGA - essential fix data which provide 3D location and
accuracy data.

GGA STRING EXAMPLE:

$GPGGA,123519,4807.038,N,01131.000,E,

1,08,0.9,545.4,M,46.9,M,,*47

Where:

GGA

Global Positioning System Fix Data

123519

Fix taken at 12:35:19 UTC

4807.038,N

Latitude 48 deg 07.038’ N

01131.000,E

Longitude 11 deg 31.000’ E

1

Fix quality:
0 = invalid
1 = GPS fix (SPS)
2 = DGPS fix
3 = PPS fix
4 = Real Time Kinematic
5 = Float RTK
6 = estimated (dead reckoning)
7 = Manual input mode
8 = Simulation mode

08

Number of satellites being tracked

0.9

Horizontal dilution of position

545.4,M

Altitude, Meters, above mean sea level

46.9,M

Height of geoid (mean sea level) above WGS84

15-16

121907

PN=24

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