Altina GGM308U manual Software Data, Nmea Output Message, Global Positioning System Fix Data GGA

Please note that the Virtual COM Port number might be different from every computer. Before using navigating software, please confirm the COM Port number created by your computer and provided by your navigation software. Otherwise, the navigating software won’t receive the satellite signal, because of the un-match COM Port setting.

5. SOFTWARE DATA

NMEA 0183 V2.2 Protocol

Use RS-232 interface 4800 bps, 8 bit data, 1 stop bit and no parity.

5.1. NMEA Output Message

Table 5-1NMEA-0183 Output Messages

NMEA Record	Description
GPGGA	Global positioning system fixed data
GPGLL	Geographic position: latitude/longitude
GPGSA	GNSS DOP and active satellites
GPGSV	GNSS satellites in view
GPRMC	Recommended minimum specific GNSS data
GPVTG	Course over ground and ground speed

5.2. Global Positioning System Fix Data (GGA)

Table 5-2 contains the values for the following example

$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18

Table 5-2GGA Data Format

Name Example Units Description

Message ID	$GPGGA
UTC Time	161229.487
Latitude	3723.2475
N/S Indicator	N
Longitude	12158.3416
E/W Indicator	W

GGA protocol header

hhmmss.sss

ddmm.mmmm

N=north or S=south

dddmm.mmmm

E=east or W=west

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