Multitech MTCMR-E1 User Manual Page 103

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Part 6 – AT Commands for GPS-Enabled Device
Universal IP AT Commands Reference Guide 103
NMEA MESSAGES
The full descriptions of supported NMEA messages are provided at the following paragraphs.
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,,,,xxxx*hh<CR><LF>
Example: $GPGGA,111636.932,2447.0949,N,12100.5223,E,1,11,0.8,118.2,M,,,,0000*02<CR><LF>
Name
Example
Description
Message ID
$GPGGA
GGA Protocol Header
UTC Time
111636.932
UTC of position in hhmmss.sss format, (000000.000 ~ 235959.999)
Latitude
2447.0949
Latitude in ddmm.mmmm format
N/S Indicator
N
Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South
Longitude
12100.5223
Longitude in dddmm.mmmm format
E/W Indicator
E
Longitude hemisphere indicator, 'E' = East, 'W' = West
GPS quality indicator
1
0: position fix unavailable
1: valid position fix, SPS mode
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
6: Estimated (dead reckoning) Mode
7: Manual Input Mode
8: Simulator Mode
Satellites Used
11
Number of satellites in use, (00 ~ 12)
HDOP
0.8
Horizontal dilution of precision, (00.0 ~ 1023)
Altitude
118.2
Antenna Altitude above/below mean sea level (geoid), (-9999.9 ~ 17999.9)
Units
M
Unit of antenna altitude (meters)
Null
,,
Field not available on GPS cards
Null
,,
Field not available on GPS cards
DGPS Station ID
0000
Differential reference station ID, 0000 ~ 1023 (NULL when DGPS not used)
Checksum
02
<CR><LF>
<CR><LF>
End of message (termination)
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