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Name
Message ID
Course
Reference
Course
Reference
Speed
Units
Speed
Units
Checksum
<CR> <LF>
(1) SiRF Technology Inc. does not support magnetic declination. All "course over ground" data are
geodetic WGS84 directions.
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-20 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-20 may decode the data correctly to
generate accurate messages and save them in battery-back SRAM for later computing.
Rikaline
Marketing Corp.
Tel: ++886 2 2934 5456 Fax: ++886 2 2934 4373
GPS-20 Operating Manual
Example
Units
$GPVTG
309.62
Degrees Measured heading
T
Degrees Measured heading
M
0.13
Knots
N
0.2
Km/hr
K
*6E
5F-1, 125, Roosevelt Road, Sec. 5, Taipei, Taiwan 116
Description
VTG protocol header
True
Magnetic (1)
Measured horizontal speed
Knots
Measured horizontal speed
Kilometers per hour
End of message termination
E-Mail:
info@rikaline.com.tw
Rikaline
web:
www.rikaline.com.tw
14
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