Hydrographic Measurement System

几十年来，多传感器系统应用于水文测量，经典地与回声测深和定位系统一起获得水深测量。随着传感器和计算机技术的最新发展，该系统已发展成为复杂的多传感器系统。近年来，技术的改进使这种水文测量系统的应用领域更加广泛。汉堡城市大学（HCU）（原汉堡应用科学大学/ HAW）的研究人员在水文领域活跃了30多年。自2019年起，HCU拥有DVocean测量船，作为水文测量系统的平台。它的尺寸（8米x 2.5米x 0.8米吃水）针对浅水进行了优化，并允许使用定制的拖车运输到更偏远的调查区域。DVocean将从事跨学科研究，不仅在广泛的大地测量学领域，而且在建筑环境科学（例如土木工程）、地球科学、自然科学和其他领域的应用方面做出贡献。为此目的，将扩大现有的合作或重新建立合作。在这种合作中，将获取、处理、分析和解释数据（例如监测河流和海床的变化和建设、绘制生境图）。此外，数据驱动的方法将得到应用和改进（例如自动分割和分类）。此外，水文测量系统本身将得到优化（例如，关于校准和对准程序，定位算法）。为了实现计划的研究项目，需要一个具有一定功能的水文测量系统。DVocean的多传感器系统需要提供地理参考水文信息，其中不仅包括水深数据，还包括水柱和上层沉积物层的信息。因此，该系统由多波束回声测深仪（MBES）、海底剖面仪（SBP）、具有CTD功能的声速剖面仪（SVP/CTD）、GNSS天线和惯性导航系统（INS）组成。

Since decades, multi-sensor systems are applied in hydrography classically with echosounder and positioning systems to acquire bathymetry. With the latest developments in sensor and computer technology, such system have been advanced into complex multi-sensor systems. The technical enhancement have resulted in a broader field of applications for such hydrographic measurement systems within the recent years. Researchers of HafenCity University Hamburg (HCU) (formerly Hamburg University of Applied Sciences / HAW) have been active within the area of hydrography for more than 30 years. Since 2019, HCU owns the survey vessel DVocean as a platform for a hydrographic measurement system. Its dimensions (8 m x 2.5 m x 0.8 m draft) are optimized for shallow waters and allow transportation with the customized trailer to more remote survey areas. The DVocean will be engaged in interdisciplinary research and contribute to investigations not only in the broad field of geodesy but also in applications of science of the built environment (e.g. civil engineering), geoscience, natural science, and others. For this purpose, current cooperation will be extended or newly established. In such cooperation data will be acquired, processed, analyzed, and interpreted (e.g. monitoring of river and seabed changes and constructions, habitat mapping). Additionally, data-driven methods will be applied and improved (e.g. automatic segmentation and classification). Furthermore, the hydrographic measurement system itself will be optimized (e. g. regarding calibration and alignment procedures, positing algorithms). To realize the planned research projects a hydrographic measurement system with certain functionalities is required. This multi-sensor system for the DVocean needs to provide georeferenced hydrographic information which includes not only bathymetric data but also information of the water column and upper sediment layers for example. Therefore, the system consists of the components multibeam echo sounder (MBES), sub-bottom profiler (SBP), sound velocity profiler with CTD functionalities (SVP/CTD), GNSS antennas, and inertial navigation system (INS).