GPS-6020 Operating Manual
Rikaline
Specifications subject to change without prior notice
Rikaline
International Corp.
10
F, 64, Kang-Ding Road, Taipei 108, Taiwan
Tel: ++886 2 2370 4688 Fax: ++886 2 2370 4686 E-Mail:
web:
www.rikaline.com.tw
10
$GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E
Table 4-10 VTG Data Format
Name Example
Units
Description
Message ID
$GPVTG
VTG protocol header
Course 309.62
Degrees Measured
heading
Reference T
True
Course
Degrees Measured
heading
Reference M
Magnetic
(1)
Speed
0.13
Knots
Measured horizontal speed
Units N
Knots
Speed
0.2
Km/hr
Measured horizontal speed
Units
K
Kilometers per hour
Checksum *6E
<CR> <LF>
End of message termination
(1) All “course over ground” data are geodetic WGS84 directions.
4.1.7 Time & Date (ZDA)
Table 4-11 contains the values for the following example:
$GPVTG,114523.62,12,04,2001,10,34*6E
Table 4-11 zda Data Format
Name Example
Units
Description
Message ID
$GPZDA
ZDA protocol header
Hour, Min, Sec, Sub
Sec
114523.62 Hhmmss.ss
Day
12
Day in UTC, 01to 12
Month
04
Month in UTC, 01 to 12
Year
2001
Year in UTC
Local Zone Hours
10
Local zone hours, +/- 13 hours
Local Zone Minutes
34
L
ocal zone minutes, 0 to +59
Checksum *6E
<CR> <LF>
End of message termination
4.2 RTCM Received Data
The default communication parameters for DGPS Input are 9600 baud, 8 data bits, stop bit, and no parity.
Position accuracy of less than 5 meters can be achieved with the GPS-6020 by using Differential GPS (DGPS)
real-time pseudo-range correction data in RTCM SC-104 format, with message types 1, 5, or 9. As using
DGPS receiver with different communication parameters, GPS-6020 may decode the data correctly to generate
accurate messages and save them in battery-back SRAM for later computing.
