WATSON INDUSTRIES GGC-E101, Руководство пользователя

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Watson Industries, Inc. GGC-E101 Rev A 08/30/2013
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Example:
$GPGLL,4451.84239,N,09128.00147,W,175612.00,A,D*78
$GPGLL message Header
4451.84239 Latitude 44 deg 51.84239 minutes
N North Latitude
09128.00147 Longitude 91 deg 28.00147 minutes
W West Longitude
175612.00 Universal Time 17 Hrs 56 min 12.00 sec
A Status = valid data
D Mode Indicator = Differential
*78 Checksum
$GPVTG Message Format
The $GPVTG consists of a string ASCII characters sent asynchronously at regular intervals. The
string is sent at 9600 baud with eight data bits, one stop bit and no parity. The contents of this
string are formed as follows:
$GPVTG,ttt.tt,c,ttt.tt,c,ggg.gg,u,ggg.gg,u,i*cc<CR><LF>
1.
The ”$GPVTG” header indicates the start of the data string. . This data is followed by a
comma.
2.
“ttt.tt” is a variable character string (minimum-4, maximum-6) representing the True course
over ground. 0.00 to 359.99 degrees. This data is followed by a comma.
3.
“c” is a single character representing true course over ground indicator.
c = T (always) for True Heading. This data is followed by a comma.
4.
“ttt.tt” is a variable character string (minimum-4, maximum-6) representing the Magnetic
course over ground. 0.00 to 359.99 degrees. This data is followed by a comma.
5.
“c” is a single character representing magnetic course over ground indicator.
c = M (always) for Magnetic Heading. This data is followed by a comma.
6.
“ggg.gg” is a variable character string (minimum-4, maximum-6) representing the speed
over ground. 0.00 to 999.99 knots. This data is followed by a comma.
7.
“u” is a single character representing speed over ground units.
u = N (always) for Nautical mile/hour. This data is followed by a comma.
8.
“ggg.gg” is a variable character string (minimum-4, maximum-6) representing the speed
over ground. 0.00 to 999.99 km/hour. This data is followed by a comma.
9.
“u” is a single character representing speed over ground units.
u = K(always) for kilometer/hour. This data is followed by a comma.
10. “i” is a single character representing the Mode Indicator. i = A for Autonomous, i = D for
Differential, i = E for Estimated.