Product specifications

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below. You may wish to follow this procedure if you need the gyro fully calibrated at
a certain time.
When your Crescent Vector unit is installed, apply power and wait several minutes
until it has acquired a GPS signal and it is computing heading. Ensure that the gyro-
aiding feature is on by issuing a $JATT,GYROAID<CR><LF> command. Then, slowly
spin the unit for one minute at a rate of no more than 15 degrees per second. Then,
let it sit stationary for four minutes. Your Crescent Vector’s gyro is now fully
calibrated. Since this setting cannot be saved, this procedure must be performed
every time the Crescent Vector’s power is cycled.
$JATT,LEVEL
This command is used to invoke the level operation mode of the Crescent Vector. If
your application will not involve the system tilting more than ±10° maximum, then
you may choose to use this mode of operation. The benefit of using level operation
is increased robustness and faster acquisition times of the RTK heading solution. By
default, this feature is turned off. The command to turn this feature on follows.
$JATT,LEVEL,YES<CR><LF>
To turn this feature off, issue the following command.
$JATT,LEVEL,NO<CR><LF>
To determine the current status of this message, issue the following command.
$JATT,LEVEL<CR><LF>
$JATT,CSEP
This command polls the Crescent Vector for the current separation between
antennas, as solved for by the attitude algorithms. It has the following format.
$JATT,CSEP<CR><LF>
The Crescent Vector will reply with the following.
$JATT,x,CSEP
Where ‘x‘ is the antenna separation in m.
$JATT,MSEP
This command is used to manually enter a custom separation between antennas
(must be accurate to within one to two centimeters). Using the new center-to-center
measurement, send the following command to the Crescent Vector.
$JATT,MSEP,sep<CR><LF>
Where ‘sep’ is the measured antenna separation entered in meters.