Maestro A2200-A Manual de usuario descargar pdf (Pagina 10)

1-2 NMEA Reference Manual—December 2007

GGA —Global Positioning System Fixed Data

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

NMEA message description.

Table 1-3 contains the values for the following example:

$GPGGA,002153.000,3342.6618,N,11751.3858,W,1,10,1.2,27.0,M,-34.2,M,,0000*5E

152 2.5 & above No 2.3 & above No 3.2.0 & above Yes

154 2.5 & above No 2.3 & above No 3.2.0 & above Yes

1. GSW2 and SiRFDRive software only output NMEA version 2.20 (and earlier). Standard binaries for SiRFXTrac, GSW3,

and GSWLT3 firmware use NMEA 3.0. Users of SiRF’s software developer’s kit can choose through software conditional

defines (UI_NMEA_VERSION_XXX) to allow a choice between NMEA 2.20 and 3.00. The file NMEA_SIF.H contains

the NMEA version defines.

2. MSS message for GSW3 and GSWLT3 is empty since they do not support BEACON.

Table 1-3 GGA Data Format

Name Example Unit Description

Message ID $GPGGA GGA protocol header

UTC Time 002153.000 hhmmss.sss

Latitude 3342.6618 ddmm.mmmm

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

Longitude

11751.3858

dddmm.mmmm

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

Position Fix Indicator 1 See Table 1-4

Satellites Used

Range 0 to 12

HDOP 1.2 Horizontal Dilution of Precision

MSL Altitude 27.0 meters

Units M meters

Geoid Separation -34.2 meters Geoid-to-ellipsoid separation.

Ellipsoid altitude = MSL Altitude + Geoid Separation.

Units M meters

Age of Diff. Corr. sec Null fields when DGPS is not used

Diff. Ref. Station ID 0000

Checksum *5E

<CR> <LF> End of message termination

Table 1-4 Position Fix Indicator

Value Description

0 Fix not available or invalid

1 GPS SPS Mode, fix valid

2 Differential GPS, SPS Mode, fix valid

3-5 Not supported

6 Dead Reckoning Mode, fix valid

Table 1-2 Supported NMEA Output Messages (Continued)

Message

SiRF Software Options

GSW2

SiRFDRive

SiRFXTrac

SiRFLoc

GSW3 & GSWLT3

SiRFDiRect

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 26 27

Comentarios a estos manuales

Sin comentarios

Maestro A2200-A Manual de usuario Pagina 10

Comentarios a estos manuales

Relacionado con productos y manuales para Navegadores Maestro A2200-A