METHOD FOR UNDERWATER SCANNING OF AN OBJECT AND TARGET FOR UNDERWATER SCANNING OF AN OBJECT

摘要

A method and corresponding arrangement for improving positioning accuracy of scanning of an underwater object includes equipping the object with at least one floating target having a part above the surface and a part below the surface, determining position data of the target from the part above the surface, scanning the object from under the surface to create measurement observations, detecting the target from the measurement observations under the surface, aligning the position data of the target from the measurement observations with the detected target in order to improve the positioning accuracy of the scanning, determining the target's attitude data time-dependently during the scanning in order to determine the position data of the part of the target below the surface on the basis of the part of the target above the surface, and correcting the alignment of the initial position data of the part of the target below the surface with the measurement observations on the basis of the attitude data.