#Digital fusion beach head 2000 patch Patch

In the first approach, residual offsets wereĭetermined using mathematical equations, evaluating the correspondence between bathymetric surfaces. Was carried out using two approaches, varying the processing sequence. For this, hydrographic data were collected in two different locations and the calibration process

#Digital fusion beach head 2000 patch Patch

Review of the patch test methodology, assessing divergences in the final calibration product, as the processing sequenceĪnd form changes. Therefore, the objetive of this study is to present a theoretical and practical Practical divergences are still observed. Despite being quite widespread and widely used, theoretical and

Relative residual angles between the angular measurement sensors and the transducer, in order to correct possibleĭeviations from the vessel's dimensional control. For multibeam systems, a widely used calibration procedure consists of the patch test. Installation, alignment or synchronization of the bathymetric instrumentation can depreciate the bathymetric data Various sensors and auxiliary components had led to more robust and accurate surveys. The appearance of multibeam systems combined with the rapid development of the technology of the Provides three representations to enable the user to evaluate theĪccuracy of the current result: a color-coded real location of theīeams, the iso-depth contours extracted from each track, and synthesizedĭepth grids which perform direct comparisons between the track depths Immediately shown on the global display of the surveyed area, which The computation is thus fully automatic, searching the best Measures and the error curve for all the previous tested values areĭisplayed. Required with successive iterations, during which both the error A first roughĬomputation is performed to help the user quickly select the range and Profiles extracted from each overlapping track. Mainly relies on performing a matching between specific sea-bottom Some environmental features (sound velocity profile). Geometric offsets of each acquisition unit (MRU, GPS, MBES, compass) and An extended set of measured information is involved, suchĪs the dynamic attitude, position and heading of the supportship, the Values are sequentially computed, according to tailored trackĪcquisitions. In the proposed patch test program, these four An imprecise knowledge of theseįour values introduces bias when computing the real 3D geographic The patch test is designed to preciselyĭetermine the static configuration of the sonar head (roll, pitch, yaw)Īnd the latency remaining between the reception of the GPS fix and its The patch test procedure is the first stage required in any