GPS R
ECEIVER
E
XT
A
NTENNA
5. NMEA protocol
GPS-610F
The serial interface protocol is based on the National Marine Electronics Association’s NMEA
0183 ASCII interface specification. This standard is fully define in “NMEA 0183, Version 3.01”
The standard may be obtained from NMEA,
www.nmea.org
GGA-
POSITIONING
5.1 GGA-GLOBAL POSITIONING SYSTEM FIX DATA
Time, position and fix related data for a GPS receiver.
Structure:
$GPGGA,hhmmss.sss,ddmm.mmmm,a,dddmm.mmmm,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF>
1
2
3
4
5
6 7 8 9
10
11 12 13
Example:
$GPGGA,060932.448,2447.0959,N,12100.5204,E,1,08,1.1,108.7,M,,,,0000*0E<CR><LF>
Field Name
1
UTC Time
Example
060932.448
Description
UTC of position in hhmmss.sss format, (000000.00 ~
235959.99)
Latitude in ddmm.mmmm format
2
3
4
5
Latitude
2447.0959
Leading zeros transmitted
Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South
Longitude in dddmm.mmmm format
N/S Indicator N
Longitude
12100.5204
Leading zeros transmitted
E/W Indicator E
Longitude hemisphere indicator, 'E' = East, 'W' = West
GPS quality indicator
0: position fix unavailable
1: valid position fix, SPS mode
GPS quality
6
indicator
1
2: valid position fix, differential GPS mode
3: GPS PPS Mode, fix valid
4: Real Time Kinematic. System used in RTK mode with fixed
integers
5: Float RTK. Satellite system used in RTK mode. Floating
integers
DS-GPS610F-1
Jul 09
©2009
www.rfsolutions.co.uk
Page 9
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