Sbas Commands - ashtech DG16 Reference Manual

SBAS commands allow you control and specify usage of WAAS, EGNOS, and
MSAS functionality. These commands are available only if the SBAS option [W] is
installed. When the [Y] option is installed, 2 channels are made available for tracking
SBAS satellites. If you did not purchase this option, and you want to now, please
call your Thales Navigation OEM Sales Representative. See Receiver Options,
on page 15 for more information on the available receiver options
The receiver can track two geostationary SBAS satellites at a time and includes
the ranging, ephemeris and SBAS differential correction data messages over the
RS232 output ports. The DG16 can process SBAS corrections for DGPS
positioning. SBAS corrections are converted to RTCM SC-104 corrections and
output through the serial ports.
In the GPS+SBAS mode, the DG16 retains all standard functionality, including high
data output rates (raw and navigation).
The DG16 has several modes of SBAS operation:
• Automatic Mode—the receiver determines which SBAS satellite(s) to use
• Single Automatic Mode
• Dual Automatic Mode
• Manual Mode—you manually set which SBAS satellite(s) to use
• Single Manual Mode
• Dual Manual Mode
The default SBAS mode is Single.
Table 9.8 outlines the SBAS commands
Function Command
$PASHS,SBA,SAM
$PASHS,SBA,DAM
$PASHS,SBA,MAN,xx
SBAS Mode
$PASHS,SBA,MAN,xx,yy Enable Dual Manual mode
$PASHS,SBA,OFF
$PASHS,SBA,SSO
$PASHS,RAW,SAW
SBAS
$PASHQ,SAW
Ephemeris
and Almanac
$PASHS,RAW,SNW
$PASHQ,SNW
304
.
Table 9.8. SBAS Commands
Description
Enable Single Automatic SBAS Mode
Enable Dual Automatic SBAS mode
Enable Single Manual mode
Disable the SBAS mode
Set SBAS satellite search order
Enable or disable SBAS almanac data
Query the SBAS almanac data
Enable or disable SBAS ephemeris data
Query the SBAS ephemeris data
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