NMEAFORMAT

Customize NMEA output

Platform:

OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2

Use the NMEAFORMAT command to customize the NMEA GPGGA and GPGGALONG output.

Modifying the NMEA output will make it not compliant with the NMEA standard.

Message ID: 1861

Abbreviated ASCII Syntax:

NMEAFORMAT field format

Factory Default:

NMEAFORMAT GGA_LATITUDE 9.4

NMEAFORMAT GGA_LONGITUDE 10.4

NMEAFORMAT GGA_ALTITUDE .2

NMEAFORMAT GGALONG_LATITUDE 12.7

NMEAFORMAT GGALONG_LONGITUDE 13.7

NMEAFORMAT GGALONG_ALTITUDE .3

Example:

The following settings increase the precision of the GPGGA latitude and longitude fields:

NMEAFORMAT GGA_LATITUDE 11.6

NMEAFORMAT GGA_LONGITUDE 12.6

The following settings decrease the precision of the GPGGALONG latitude and longitude fields:

NMEAFORMAT GGALONG_LATITUDE 11.6

NMEAFORMAT GGALONG_LONGITUDE 12.6

The following setting stops the undulation fields of the GPGGALONG log being filled, making a log like the GPGGARTK log that was in NovAtel's OEM6 firmware:

NMEAFORMAT GGALONG_UNDULATION !0

Field	Field Type	ASCII Value	Binary Value	Description	Format	Binary Bytes	Binary Offset
1	Command header	-	-	NMEAFORMAT header This field contains the command name for abbreviated ASCII or the message header for ASCII (see page 1) or Binary (see page 1).	-	H	0
2	Field	GGA_LATITUDE	0	GPGGA latitude field	Enum	4	H
		GGA_LONGITUDE	1	GPGGA longitude field
		GGA_ALTITUDE	2	GPGGA altitude (height) field
		GGA_UNDULATION	3	GPGGA undulation field
		GGALONG_LATITUDE	10	GPGGALONG latitude field
		GGALONG_LONGITUDE	11	GPGGALONG longitude field
		GGALONG_ALTITUDE	12	GPGGALONG altitude (height) field
		GGALONG_UNDULATION	13	GPGGALONG undulation field
3	Format	Char[8]		The Format field has a syntax similar to the printf function commonly found in programming languages. The format is: !x.y Where: y is the number of digits to display after the decimal point x sets the minimum field width including the decimal point. X is optional if ! is not used. If the value requires fewer digits than x, leading zeros are added to the output. ! forces the field width to x. ! is optional. If a value exceeds the permitted width, the value will be saturated. If ! is used, y must be less than x. Examples (GGA_LATITUDE):   .5 = 5106.98120   2.3 = 5106.981   7.1 = 05107.0   !7.2 = 5106.98   !7.3 = 999.999	Char[8]	8	H+4