One of the main sources of error when conducting multibeam surveys from ROVs is the timing of the data producing artfacts in the bathymetry. Finding out what the latency is has not been easy. The way it used to be calcuated was to extract the roll data and an outer beam value and compare the two. If they correlate then there is latency in the system. The roll timing is then adjusted to eliminate the correlation and therefore the artefact. With Qimera 1.1 you can look at any combinatation of sensors and results and then use the tools inside Qimera to eliminate the latency.
Surveying with ROVs? You need Time Series Multiplot
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If you are wanting to collect great backscatter data to create mosaics then this poster from Jonathan Beaudoin is a must read. It shows you how to set the sonar up, use SVP data and then process it in...Read more