Product specifications

HAPTER

RESCENT

ECTOR

OMMANDS

This section details the various settings that relate to the GPS heading aspect of the

Crescent Vector OEM heading system. For a comprehensive list of all commands that

can be used with the Crescent Vector, please refer to the CSI Programming Manual,

available for download from our website at:

http://www.csi-wireless.com/products/documents/ProgrammingManual_011.pdf

The following table summarizes the commands detailed in this section.

Table 6-1 GPS Heading Commands

Message Description

TILTAID Command to turn on tilt aiding and query the current feature status

TILTCAL Command to calibrate tilt aiding and query the current feature status

GYROAID Command to turn on gyro aiding and query the current feature status and query the

current feature status

LEVEL Command to turn on level operation and query the current feature status

CSEP Query to retrieve the current separation between GPS antennas

MSEP Command to manually set the GPS antenna separation and query the current setting

HTAU Command to set the heading time constant and to query the current setting

PTAU Command to set the pitch time constant and to query the current setting

HRTAU Command to set the rate of turn time constant and to query the current setting

JTAU,COG Command to set the course over ground time constant and to query the current setting

JTAU,SPEED Command to set the speed time constant and to query the current setting

HBIAS Command to set the heading bias and to query the current setting

PBIAS Command to set the pitch bias and to query the current setting

NEGTILT Command to turn on the negative tilt feature and to query the current setting

ROLL Command to configure the Crescent Vector for roll or pitch output

SEARCH Command to force a new RTK heading search

FLIPBRD Command to allow upside down installation

SUMMARY Query to show the current configuration of the Crescent Vector

HELP Query to show the available commands for GPS heading operation and status

$JATT,TILTAID

The Crescent Vector’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 Crescent Vector, 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>