Attachment C_R.B23636.001.02.SEMP_final_lowres

4.2 System Communication and Calibration
After the POS MV system was installed and all cables connected, basic system
communication tests were conducted to ensure that all sensors composing the POS MV were
receiving or sending data. This included checking whether the Marinestar navigation aiding
solution was being received.
The figure below shows an example of Marinestar reception in POSView, the online interface
associated with the POS MV. Fields within the User Interface (UI) were monitored for
changing values and reception of the Marinestar signal is shown in the Nav Status field.




Figure 11: POS MV Communication and Integration Tests – Marinestar integration received successful,
                      IMU, PGNSS and SGNSS received successfully.



Communication between the POS MV and the ET6205 TPU were also tested.
The heading solution for the system was already established from previous work with this
vessel and mount system. The POS MV heading solution (and associated vector between
antennas) is called a GNSS Azimuth Measurement System (GAMS). The final values derived
are as follows: X = 0.022m, Y = -2.005m, and Z = 0.008m.
Another vector derived from the data is the Primary GNSS antenna to the survey Reference
Point (selected as the target on top of the IMU). This vector was manually measured but
further refinement was possible through analysing the POS MV data acquired during the
various survey days. The final values derived are as follows: X = -0.220m, Y = 1.034m, and Z
= -0.971m.
Finally, a combination of physical measurements and design drawings for the USM mount
were used to derive a final lever arm vector for the Reference Point to the Acoustic Centre of
the ET6205. This vector is required to provide proper motion compensation and positioning
for the MPES data. The final values derived are as follows: X = -0.063m, Y = 0.401m, and Z =
1.764m.




13                             Noosa Council - Noosa River Survey                       20.06.2019