MDEV-GPS-RM datasheet(10/27 Pages) LINX

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GLL – Geographic Position – Latitude / Longitude

Figure 11 contains the values for the following example:

$GPGLL,2503.6319,N,12136.0099,E,053740.000,A,A*52

GSA – GPS DOP and Active Satellites

Figure 12 contains the values for the following example:

$GPGSA,A,3,24,07,17,11,28,08,20,04,,,,,2.0,1.1,1.7*35

GPS DOP and Active Satellites Example

Name

Example

Units

Description

Message ID

$GPGSA

GSA protocol header

Mode 1

See Figure 13

Mode 2

1=No fix, 2=2D, 3=3D

ID of satellite used

Sv on Channel 1

ID of satellite used

Sv on Channel 2

...

ID of satellite used

Sv on Channel N

PDOP

2.0

Position Dilution of Precision

HDOP

1.1

Horizontal Dilution of Precision

VDOP

1.7

Vertical Dilution of Precision

Checksum

*35

End of message termination

Geographic Position – Latitude / Longitude Example

Name

Example

Units

Description

Message ID

$GPGLL

GLL protocol header

Latitude

2503.6319

ddmm.mmmm

N/S Indicator

N=north or S=south

Longitude

12136.0099

dddmm.mmmm

E/W Indicator

E=east or W=west

UTC Time

053740.000

hhmmss.sss

Status

A=data valid or V=data not valid

Mode

A=autonomous, N=Data not valid,

R=Coarse Position, S=Simulator

Checksum

*52

End of message termination

Figure 11: Geographic Position – Latitude / Longitude Example

Figure 12: GPS DOP and Active Satellites Example

GSV – GPS Satellites in View

Figure 14 contains the values for the following example:

$GPGSV,3,1,12,28,81,285,42,24,67,302,46,31,54,354,,20,51,077,46*73

$GPGSV,3,2,12,17,41,328,45,07,32,315,45,04,31,250,40,11,25,046,41*75

$GPGSV,3,3,12,08,22,214,38,27,08,190,16,19,05,092,33,23,04,127,*7B

Mode 1 Values

Value

Description

Manual – forced to operate in 2D or 3D mode

Automatic – allowed to automatically switch 2D/3D

GPS Satellites in View Example

Name

Example

Units

Description

Message ID

$GPGSV

GSV protocol header

Total number of

messages1

Range 1 to 4

Message number1

Range 1 to 4

Satellites in view

Satellite ID

Channel 1 (Range 01 to 196)

Elevation

degrees Channel 1 (Range 00 to 90)

Azimuth

285

degrees Channel 1 (Range 000 to 359)

SNR (C/No)

dB–Hz

Channel 1 (Range 00 to 99, null when not

tracking)

Satellite ID

Channel 2 (Range 01 to 196)

Elevation

degrees Channel 2 (Range 00 to 90)

Azimuth

077

degrees Channel 2 (Range 000 to 359)

SNR (C/No)

dB-Hz

Channel 2 (Range 00 to 99, null when not

tracking.

Checksum

*73

End of message termination

1. Depending on the number of satellites tracked, multiple messages of GSV data

may be required.

Figure 13: Mode 1 Values

Figure 14: GPS Satellites in View Example

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