ST2276
Scientech Technologies Pvt. Ltd.
44
yyyyy.yy,a = Longitude of position fix, E/W
x.x = Elevation angle
x.x = Number of iterations
x.x = Number of Doppler intervals
x.x = Update distance, nautical miles
x.x = Satellite ID
$GPSTN :
Multiple Data ID :
This sentence is transmitted before each individual sentence where there is a need for
the Listener to determine the exact source of data in the system. Examples might
include dual-frequency depthsounding equipment or equipment that integrates data
from a number of sources and produces a single output.
$--STN,xx
xx = Talker ID number, 00 to 99
$GPVBW :
Dual Ground/Water Speed
Water referenced and ground referenced speed data.
$-- VBW, x.x, x.x, A, x.x, x.x, A
x.x = Longitudinal water speed, knots
x.x = Transverse water speed, knots
A = Status: Water speed, A = Data valid
x.x = Longitudinal ground speed, knots
x.x = Transverse ground speed, knots
A = Status : Ground speed, A = Data valid
$GPVTG :
Track Made Good and Ground Speed.
Eg, l. $GPVTG, 360.0, T, 348.7, M, 000.0, N, 000.0, K*43
Eg 2. $GPVTG, 054. 7, T, 034.4, M, 005.5, N, 01 0.2, K*41
054.7, T True course made good over ground, degrees
034.4, M Magnetic course made good over ground, degrees
005.5, N Ground speed, N = Knots
010.2, K Ground speed, K = Kilometers per hour
Eg3. For NMEA 0183 version 3.00 active the Mode indicator field is added at the end
$GPVTG, 054.7, T, 034.4, M, 005.5, N, 010.2, K, A*53
A Mode indicator (A Autonomous, D Differential, E Estimated, N Data not valid)
HiK-Consulting