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Output Messages 1-3

Note – A valid position fix indicator is derived from the SiRF Binary M.I.D. 2 position

mode 1. See the SiRF Binary Protocol Reference Manual.

GLL—Geographic Position - Latitude/Longitude

Note – Fields marked in italic red apply only to NMEA version 2.3 (and later) in this

NMEA message description.

Table 1-5 contains the values for the following example:

$GPGLL,3723.2475,N,12158.3416,W,161229.487,A,A*41

GSA—GNSS DOP and Active Satellites

Note – Fields marked in italic red apply only to NMEA version 2.3 (and later) in this

NMEA message description.

Table 1-6 contains the values for the following example:

$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33

Table 1-5 GLL Data Format

Name Example Unit Description

Message ID $GPGLL GLL protocol header

Latitude 3723.2475 ddmm.mmmm

N/S Indicator N N=north or S=south

Longitude 12158.3416 dddmm.mmmm

E/W Indicator W E=east or W=west

UTC Time 161229.487 hhmmss.sss

Status A A=data valid or V=data not valid

Mode A A=Autonomous, D=DGPS, E=DR (Only present in NMEA v3.00)

Checksum *41

<CR> <LF> End of message termination

Table 1-6 GSA Data Format

Name Example Unit Description

Message ID $GPGSA GSA protocol header

Mode 1 A See Table 1-7

Mode 2 3 See Table 1-8

Satellite Used

1. Satellite used in solution.

07 SV on Channel 1

Satellite Used

02 SV on Channel 2

.... ....

Satellite Used

SV on Channel 12

PDOP 1.8 Position Dilution of Precision

HDOP 1.0 Horizontal Dilution of Precision

VDOP 1.5 Vertical Dilution of Precision

Checksum *33

<CR> <LF> End of message termination

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 26 27

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