Product specifications

Crescent Integrator’s Manual 40
To determine what the current pitch compensation angle is, send the following
message to the Crescent Vector.
$JATT,PBIAS<CR><LF>
Note: The pitch / roll bias is added after the negation of the pitch / roll
measurement (if so invoked with the $JATT,NEGTILT command).
$JATT,NEGTILT
When the secondary GPS antenna is below the primary GPS antenna, the angle from
the horizon at the primary GPS antenna to the secondary GPS antenna is considered
negative.
Depending on your convention for positive and negative pitch / roll, you may wish to
change the sign (either positive or negative) of the pitch / roll. To do this, issue the
following command.
$JATT,NEGTILT,YES<CR><LF>
To return the sign of the pitch / roll measurement to its original value, issue the
following command.
$JATT,NEGTILT,NO<CR><LF>
To query the Crescent Vector for the current state of this feature, issue the following
command.
$JATT,NEGTILT<CR><LF>
$JATT,ROLL
If you wish to get the roll measurement, you will need to install the Antenna Array
perpendicular to the vessel’s axis, and send the following command to the Crescent
Vector.
$JATT,ROLL,YES<CR><LF>
If you wish to return the Crescent Vector to its default mode of producing the pitch
measurement, issue the following command.
$JATT,ROLL,NO<CR><LF>
You may query the Crescent Vector for the current roll / pitch status with the
following command.
$JATT,ROLL<CR><LF>