Uncertainty Assessment of Bathymetric Data Collected Through Unmanned Autonomous Platforms
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Abstract
Hydrography consists in a science related to physical geography, which studies all types and variations of aquatic bodies. For a coherent submerged bottom description, manned vessels equipped with sounding systems are commonly used to carry out a hydrographic survey. However, the difficulty of access to remote areas or even guarantees the fact that location poses a risk to crew members made the use of unmanned autonomous vehicles become increasingly common. At this juncture, it is known that hydrographic surveys conducted by these platforms, as well as any other type of survey, contain uncertainties that directly affects bathymetric data. Thus, this article aims to present a methodology for the theoretical assessment of Total Propagated Uncertainty (TPU) in ASV (Autonomous Surface Vessel), as well as to compare the results with sample uncertainty acquired in a bathymetric survey, at Jansen's Lagoon in São Luís-MA, to finally carry out the uncertainty model validation. The results showed that the theoretical uncertainty model is coherent with the sample uncertainties obtained.
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