June 01, 2004
GPS Programming & .NET
June, 2004: GPS Programming & .NET
| Field |
Description |
Format |
| (a) |
| 1 |
Universal Time Coordinated (UTC) (Greenwich time) |
HHMMSS.SSS |
| 2 |
Latitude |
DDMM.MMM |
| 3 |
Hemisphere. North/South |
N/S |
| 4 |
Longitude |
DDDMM.MMM |
| 5 |
Hemisphere. East/West |
E/W |
| 6 |
Fix valid. No fix/Normal fix/DGPS fix |
0/1/2 |
| 7 |
Number of satellites in view. 00-12 |
NN |
| 8 |
Horizontal dilution of precision (meters) |
D.DDD |
| 9 |
Altitude above mean sea level (meters) |
D.DDD |
| 10 |
Unit of field 9 |
M |
| 11 |
Difference between WGS84 ellipsoid and mean sea level (meters) |
D.DDD |
| 12 |
Unit of field 10 |
M |
| 13 |
DGPS specific |
| 14 |
D:o |
| Sample:
$GPGGA,145326.347,5053.7408,N,00436.4477,E,1,03,24.3,112.5,M,,,,0000*30 |
| (b) |
| Field |
Description |
Format |
| 1 |
Latitude |
DDMM.MMM |
| 2 |
Hemisphere. North/South |
N/S |
| 3 |
Longitude |
DDDMM.MMM |
| 4 |
Hemisphere. East/West |
E/W |
| 5 |
Universal Time Coordinated (UTC) (Greenwich time). |
HHMMSS.SSS |
| 6 |
Valid/Not valid |
A/V |
| Sample: $GPGLL,5917.102,N,01807.157,E,201349,A*23 |
| (c) |
| Field |
Description |
Format |
| 1 |
Universal Time Coordinated (UTC) (Greenwich time). |
HHMMSS.SSS |
| 2 |
Valid/Not valid |
A/V |
| 3 |
Latitude |
DDMM.MMM |
| 4 |
Hemisphere. North/South |
N/S |
| 5 |
Longitude |
DDDMM.MMM |
| 6 |
Hemisphere. East/West |
E/W |
| 7 |
Speed over ground (knots) |
D.DDD |
| 8 |
Direction of movement (degrees) |
DDD.D |
| 9 |
Date |
DDMMYY |
| 10 |
Magnetic variation (degrees) |
DDD.D |
| 11 |
Magnetic variation direction |
East/West E/W |
| Sample:
$GPRMC,201348,A,5917.102,N,01807.157,E,000.0,360.0,070103,003.3,E*7E |
| (d) |
| Field |
Description |
Format |
| 1 |
Direction of movement True North (degrees) |
DDD.D |
| 2 |
Type of direction for field 1 |
T |
| 3 |
Direction of movement Magnetic North (degrees) |
DDD.D |
| 4 |
Type of direction for field 3 |
M |
| 5 |
Speed (knots) |
D.DDD |
| 6 |
Unit for field 5 |
N |
| 7 |
Speed (km/h) |
D.DDD |
| 8 |
Unit for field 7 |
K |
| Sample: $GPVTG,110.5,T,M,0.89,N,1.7,K*52 |
Table 2: (a) GGA, GPS fix data; (b) GLL, geographic
position (latitude/longitude); (c) RMC, recommended minimum navigation
information; (d) VTG, track made good, and ground speed.
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