Vector Sensor Reference Manual 22
Vector is first turned on that it be used for the first 5 to 10 minutes in an environment that has
high dynamics as well, instead of just sitting stationary.
1.8 NMEA 0183 Message Interface
The Vector Sensor uses a NMEA 0183 interface, which allows you to easily make configuration
changes by sending text-type commands to the receiver.
Each of the following sections provide the appropriate commands for making the configuration
change discussed. The NMEA interface of the Vector Sensor is described in more detail in
Chapter 6.
1.8.1 Tilt Aiding
The Vector sensor’s internal tilt sensor (accelerometer) is enabled by default and constrains the
RTK heading solution to reduce startup and reacquisition times. Since this sensor resides inside
the Vector Sensor, the receiver enclosure must be installed in a horizontal plane, as must the
Antenna Array,
To turn the tilt-aiding feature off, use the following command.
$JATT,TILTAID,NO<CR><LF>
You may turn this feature back on with the following command.
$JATT,TILTAID,YES,<CR><LF>
To query the Vector Sensor for the current status of this feature, issue the following command.
$JATT,TILTAID<CR><LF>
Note - If you choose to increase the antenna separation beyond the default 0.5 m
length, use of tilt aiding is required.
1.8.2 Tilt Sensor Calibration
The tilt sensor within the Vector Sensor is pre-calibrated during the manufacturing process so it’s
not necessary that it be recalibrated in the field. If, for some reason, recalibration is necessary,
Chapter 6 describes the command and methodology required to recalibrate this sensor.
1.8.3 Magnetic Aiding
For shipping purposes, magnetic aiding is disabled, but, it is required to be turned on and calibrated
when the final installation is complete. The Vector’s internal magnetometer reduces the time
required to compute a heading solution on startup and during GPS reacquisition by constraining
the moving base station RTK solution. Further, it reduces the likelihood of computing the wrong
GPS solution. With an approximate heading from the magnetometer, the search volume for the
RTK solution is reduced, since the Vector has a general indication of the direction of the
secondary GPS antenna.
To Next Page
Loading...
Need help?
General
