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NMEA V2.2 Protocol
It is the RS-232 interface：4800 bps, 8 bit data, 1 stop bit and no parity.
NMEA Output Messages
The Sapphire outputs the following messages as shown in Table 1：
TABLE 1 NMEA OUTPUT MESSAGES
NMEA Record Description
GGA Global positioning system fixed data
GSA GNSS DOP and active satellites
GSV GNSS satellites in view
RMC Recommended minimum specific GNSS data
GGA－
－－
－Global Positioning System Fixed Data
Table 2 contains the values of the following example：
$GPGGA, 161229.487, 3723.2475, N, 12158.3416, W, 1, 07, 1.0, 9.0, M, , , ,0000*18
TABLE 2 GGA DATA FORMAT
Name Example Units Description
Message ID $GPGGA GGA protocol header
UTC Position 161229.487 hhmmss.sss
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table 5-1
Satellites Used 07 Range 0 to 12
HDOP 1.0 Horizontal Dilution of Precision
MSL Altitude 9.0 meters
Units M meters
Geoid Separation meters
Units M meters
Age of Diff. Corr. second Null fields when DGPS is not used
Diff. Ref. Station ID 0000
Checksum *18
＜CR＞＜LF＞
End of message termination