Advanced Navigation Certus OEM Reference Manual page 114

Certus Reference Manual • Configuring and Monitoring Certus
Note: Zero Current Orientation will only correct for roll and pitch offsets, the Heading offset must be
entered manually and saved before using this function.
All the other offsets will be measured in the realigned body co-ordinate frame (X positive forward, Z positive
down) after being corrected for any alignment offset entered.
GNSS Antenna Offset
The GNSS antenna offset is measured from the centre of the Certus unit to the phase centre of the primary
antenna in the orientation of the
Odometer Offset
The odometer offset is measured from the centre of the Certus unit to the point at which the vehicle's tyre being
measured makes contact with the road in the body co-ordinate frame (X positive forward, Z positive down).
If your odometer is not measuring a specific wheel, the offset should be to the point on the ground beneath the
measurement point. If, for example, your car is a front wheel drive and you are using the velocity from the car
OBDII port, the measurement point would be midway between the two front wheels.
External Data Offset
These values are only required for specialty applications operating with an external source of velocity data. The
offsets are used when providing NMEA Input, External GNSS, or with an Air Data Unit. When using a DVL, use
the odometer offset. Contact
8.2.7.6 Port Mode and Baud Rates
Some machines running Microsoft Windows do not support higher baud rates. When changing baud rates, it is
recommended to test the baud rate configuration first, without ticking the Permanent box. This way, if it is not
possible to communicate at the higher baud rate, a power cycle can be used to revert to the previous baud rate
setting.
The factory default baud rate value for these ports is 115200 bps.
Note: The primary and auxiliary ports on Certus OEM are UART only, and cannot be changed to
RS232 or RS422. An appropriate adapter/interface is required to connect to a computer.
Figure 81: Manager Baud Rates Dialogue
v2.4
11.3 The Body Co-ordinate Frame
support@advancednavigation.com
Page 101
(X positive forward, Z positive down).
for assistance with these values.
2024-12-17