GPSM001
OEM GPS Receiver Module
NMEA STANDARD MESSAGE SET SPECIFICATION
The XE1610-OEMPVT supports NMEA-0183. Brief descriptions of the output messages are provided below.
NMEA Standard Commands
RF Solutions receivers use the standard output messages listed in Table 1:
NMEA
GGA
GLL
GSA
GSV
RMC
VTG
ZDA
Message Description
Global positioning system fixed data
Geographic position – latitude/longitude
GNSS DOP and active satellites
GNSS satellites in view
Recommended minimum specific GNSS data
Course over ground and ground speed
Time & Date
Table 1. NMEA-0183 Messages
After a reset condition occurs, as defined above, the default setting for NMEA commands is GGA, GSA, GSV and RMC,
with update every second. This setting can be modified with the PXEMaNM manufacturer specific command defined
hereafter.
GGA —Global Positioning System Fixed Data
Description: This message reports the global positioning system fixed data, as shown in Table 2.
Name
Message ID
UTC Position
Latitude
N/S Indicator
Longitude
E/W Indicator
Position Fix Indicator
Satellites Used
HDOP
MSL Altitude
1
Units
Geoid Separation
1
Units
Age of Diff. Corr.
Diff. Ref. Station ID
Checksum
<CR><LF>
1
Example
$GPGGA
161229.487
3723.2475
N
12158.3416
W
1
07
1.0
9.0
M
M
0000
*18
Units
Description
GGA protocol header
hhmmss.sss
ddmm.mmmm
N = north or S = south
dddmm.mmmm
E = east or W = west
See xxx0
Range 0 to 12
Horizontal Dilution of Precision
Meters
Meters
Meters
Meters
Second
Null fields when DGPS is not used
End of message termination
does not support geoid corrections. Values are WGS-84 ellipsoid heights.
Table 2. GGA Data Format
Value
0
1
2
3
Description
Fix not available or invalid
GPS SPS Mode, fix valid
Differential GPS, SPS Mode, fix valid
GPS PPS Mode, fix valid
Table 3. Position Fix Indicator
Example: The values reported in this example are interpreted as shown in Table 2:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,
1.0,9.0,M, ,M, ,0000*18
DS031-2 Jan ‘04
©2003 RF Solutions Ltd, www.rfsolutions.co.uk
Tel 01273 898000 Fax 01273 480661
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