19
Software Data
NMEA 0183 V3.0 Protocol
It is the RS-232 interface
：
4800 bps, 8 bit data, 1 stop bit and no parity.
NMEA Output Messages
The RFG-2000 outputs the following messages as shown in Table 1
：
TABLE 1 NMEA OUTPUT MESSAGES
NMEA Record
Description
GGA
Global positioning system fixed data
GLL Geographic
position – Latitude/Longitude
GSA
GNSS DOP and active satellites
GSV
GNSS satellites in view
RMC
Recommended minimum specific GNSS data
VTG
Course over ground and ground speed
GGA
－
Global Positioning System Fixed Data
Time, position and fix related data for a GPS receiver.
$GPGGA,hhmmss.dd,xxmm.dddd,<N|S>,yyymm.dddd,<E|W>,v,ss,d.d,h.h ,M,g.g,M,a.a,xxxx*
hh<CR><LF>
Example:
$GPGGA,111200.02,6016.3092,N,02458.3841,E,1,09,0.8,30.6,M,18.1,M,,*5D
Name Example
Units
Description
Message ID
$GPGGA
GGA protocol header
UTC Time
111200.02
hhmmss.dd
hh = hours
mm = minutes
ss = seconds
dd = decimal parts of seconds
Latitude 6016.3092
xxmm.dddd
xx = degrees
mm = minutes
dd = decimal parts of minutes
<N|S> Indicator
N
N=north or S=south
Longitude 02458.3841
yyymm.dddd
yyy = degrees
mm = minutes