Multitech MTCMR-E1 Manual de usuario descargar pdf (Pagina 103)

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

Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South

Longitude

12100.5223

Longitude in dddmm.mmmm format

E/W Indicator

Longitude hemisphere indicator, 'E' = East, 'W' = West

GPS quality indicator

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

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

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

End of message (termination)

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 118 119

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