GGA Global Positioning System Fix Data. Time, Position and fix related data

GGA Global Positioning System Fix Data. Time, Position and fix related data

for a GPS receiver

 
 

Time	Lat N Long E qua #s dilu alt M at' M age chk
1	2 3 4 5 6 7 8 9 10 11 12 13 14 15

$--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x, xx, x.x,x.x,M, x.x, M, x.x,xxxx*hh

1) Time (UTC)

2) Latitude

3) N or S (North or South)

4) Longitude

5) E or W (East or West)

6) GPS Quality Indicator,

0 - fix not available,

1 - GPS fix,

2 - Differential GPS fix

7) Number of satellites in view, 00 - 12

8) Horizontal Dilution of precision

9) Antenna Altitude above/below mean-sea-level (geoid)

10) Units of antenna altitude, meters

11) Geoidal separation, the difference between the WGS-84 earth

ellipsoid and mean-sea-level (geoid), "-" means mean-sea-level below ellipsoid

12) Units of geoidal separation, meters

13) Age of differential GPS data, time in seconds since last SC104

type 1 or 9 update, null field when DGPS is not used

14) Differential reference station ID, 0000-1023

15) Checksum

 
 

GSA GPS DOP and active satellites

list of satellites number

1	2 3 14 15 16 17 18
Sel Md	Md IDs… IDs PDOP HDOP VDOP chk

$--GSA, a, a, x, x,x,x,x,x,x,x,x,x,x,x, x.x, x.x, x.x *hh

1) Selection mode

2) Mode

3) ID of 1st satellite used for fix

4) ID of 2nd satellite used for fix

...

14) ID of 12th satellite used for fix

15) PDOP in meters

16) HDOP in meters

17) VDOP in meters

18) Checksum

 
 

 
 

GSV Satellites in view

1	2 3 {4 5 6 7 } n
tot	mn #s {sn elv azi snr} chk

$--GSV, x, x, x, x, x, x, x, ...*hh

1) total number of messages

2) message number

3) satellites in view

4) satellite number

5) elevation in degrees

6) azimuth in degrees to true

7) SNR in dB

more satellite infos like 4)-7)

n) Checksum

 
 

RMC Recommended Minimum Navigation Information

12

1 2 3 4 5 6 7 8 9 10 11|

| | | | | | | | | | | |

$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxx,x.x,a*hh

1) Time (UTC)

2) Status, V = Navigation receiver warning

3) Latitude

4) N or S

5) Longitude

6) E or W

7) Speed over ground, knots

8) Track made good, degrees true

9) Date, ddmmyy

10) Magnetic Variation, degrees

11) E or W

12) Checksum

 
 

RMC Recommended Minimum Navigation Information

12

1 2 3 4 5 6 7 8 9 10 11|

| | | | | | | | | | | |

$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxx,x.x,a*hh

1) Time (UTC)

2) Status, V = Navigation receiver warning

3) Latitude

4) N or S

5) Longitude

6) E or W

7) Speed over ground, knots (1 knots = 1852 meters per hour = 0.514444 meters per seconds)

8) Track made good, degrees true

9) Date, ddmmyy

10) Magnetic Variation, degrees

11) E or W

12) Checksum

 
 

VTG Track Made Good and Ground Speed

1 2 3 4 5 6 7 8 9

| | | | | | | | |

$--VTG,x.x,T,x.x,M,x.x,N,x.x,K*hh

1) Track Degrees

2) T = True

3) Track Degrees

4) M = Magnetic

5) Speed Knots

6) N = Knots

7) Speed Kilometers Per Hour

8) K = Kilometres Per Hour

9) Checksum