This work describes a continuous sampling system that has been designed, implemented, and tested for the acquisition of Inherent Optical Properties (IOPs) during field campaigns. The major challenge of the work was to design and build a flow-through housing accounting for the complex sensing geometry of the ECO-VSF3, a backscattering meter, i.e., three sensor heads each of which measures the VSF at three angles. A detailed characterization of the ECO-VSF3 housing in terms of impact of the boundaries and overall system inertia is reported. A key feature of the system design is the possibility to easily detach the IOP package from the flow-through hydraulic circuit and use it in cast mode at fixed stations. This, to the best of authors' knowledge, is the first time the ECO-VSF3 is used in an underway system. Results from the comparison of continuous (Co) and cast (Ca) b_b measurements show excellent agreement, with differences not exceeding 7%, thus proving the system to be reliable and highlighting the feasibility for increasing the spatio-temporal sampling of surface observations.

中文翻译：

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用于固有光学特性测量的单双模式（连续和投射）仪器包：背散射观察桶的表征

这项工作描述了一个连续采样系统，该系统已设计、实施和测试用于在现场活动期间获取固有光学特性 (IOP)。这项工作的主要挑战是设计和建造一个流通外壳，以考虑 ECO-VSF3 的复杂传感几何形状，一个反向散射计，即三个传感器头，每个头在三个角度测量 VSF。报告了 ECO-VSF3 外壳在边界和整体系统惯性的影响方面的详细特征。该系统设计的一个关键特点是可以轻松地将 IOP 组件从流通式液压回路中分离出来，并在固定站以浇铸模式使用。据作者所知，这是首次在运行系统中使用 ECO-VSF3。_b测量结果显示出极好的一致性，差异不超过 7%，从而证明该系统是可靠的，并突出了增加地表观测时空采样的可行性。