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• Acoustic point sensors (ASTM, UHCM, ADV)
  ...elft Hydraulics Laboratory</ref>. The article describes how acoustic point sensors can be used to measure velocity and sand concentrations. [[Image:H5645figure3.jpg|thumb|right|Figure 3: 5-fold sensors of ASTM]]
  12 KB (1,685 words) - 16:25, 8 September 2020
• Acoustic backscatter profiling sensors (ABS)
  ...and 2). An acoustic backscatter instrumentation package comprises acoustic sensors, data acquisition, storage and control electronics, and data extraction and * [[General principles of optical and acoustical instruments]]
  22 KB (3,217 words) - 11:14, 9 September 2020
• Optical Laser diffraction instruments (LISST)
  ....C. and Pottsmith, H.C. 2002. ''Laser Diffraction Method: two new sediment sensors''. Sequoia Inc., USA [http://www.sequoiasci.com].</ref>). Diffraction patte [[Image:H5643figure1b.jpg|thumb|none|250px|Figure 1b: Optical path and sampling volume]]
  9 KB (1,258 words) - 21:00, 29 June 2019
• Currents and turbulence by acoustic methods
  ...r is a more direct method to estimate turbulence using an [[Acoustic point sensors (ASTM, UHCM, ADV)#Point-measuring Acoustic Doppler Velocitymeter (ADV)|Acou ..., USA</ref>). This technique is used by ADV (R) (see also [[Acoustic point sensors (ASTM, UHCM, ADV)]] and is available in certain Doppler Profilers from RDI
  22 KB (3,631 words) - 22:30, 25 October 2020
• Sampling tools for the marine environment
  ...asure, for example, conductivity, temperature, pressure, [[fluorescence]], optical transmission, dissolved oxygen, and light levels. ...rface<ref> https://www.whoi.edu/what-we-do/explore/instruments/instruments-sensors-samplers/gravity-corer/ </ref>|.
  21 KB (3,409 words) - 22:24, 20 August 2020
• Ships of opportunity and ferries as instrument carriers
  * bio-fouling can be more easily prevented (inline sensors), ...m/s. This already decreases the tendency for building bacterial slimes on sensors and tube surfaces. A small part of the water is filtered by a hollow-fibre
  4 KB (621 words) - 17:09, 18 August 2020
• Turbidity sensors
  ...elength of the incident radiation, the measuring angle, and on the shape, optical characteristics and size distribution of the suspended particles. In measur ===Nephelometers and other Optical Sensors===
  14 KB (2,148 words) - 15:04, 22 August 2020
• Instruments and sensors to measure environmental parameters
  ...o explains the properties of available [[oceanographic instruments]] and [[sensors]]. An oceanographic instrument generally consists of one or more [[sensors]] as well as a signal processing unit that converts the sensor signal and c
  7 KB (945 words) - 15:28, 3 September 2020
• HyMap: Hyperspectral seafloor mapping and direct bathymetry calculation in littoral zones
  ...operties, surface and [[sun glitter]] effects are corrected as well as the optical properties of water constituents in the water bulk. The physics based modul However, so far only hyperspectral airborne sensors such as AISA, ARES, CASI, HYMAP or ROSIS accomplish data rates that facilit
  19 KB (2,865 words) - 13:10, 7 December 2023
• Optical measurements in coastal waters
  ...nts) to measure optical properties in coastal waters. Attention is paid to optical measurements in general, regional characteristics and implications for [[re Optical measuments using satellite and airborne sensors is a powerful, operational tool for monitoring [[coastal zone]]s. This tech
  16 KB (2,211 words) - 21:29, 24 February 2024
• Monitoring coastal morphodynamics using high-precision multibeam technology
  ...opagation. Any ship movement is compensated for by rapidly sampling motion sensors. Dynamical vertical and horizontal positioning of the multibeam-transducer *[[General principles of optical and acoustical instruments]]
  11 KB (1,692 words) - 15:37, 20 September 2020
• Differentiation of major algal groups by optical absorption signatures
  ...ntral light source get reflected at the wall multiple times and travel for optical path lengths between 1-3 m until they reach the radiance sensor. Due to the ...ps in a monitoring system, techniques are needed to measure these specific optical properties. One possibility is to use the chlorophyll fluorescence excitati
  6 KB (896 words) - 15:39, 20 September 2020
• Remote sensing of zooplankton
  ...h sizes also bias results. Therefore, a new and promising concept for fast optical in-situ detection of zooplankton was developed that allows the investigatio ...The combination of digital imaging techniques combined with environmental sensors helps to achieve the goal of small-scale investigations over large ranges.
  10 KB (1,457 words) - 17:56, 18 February 2024
• Flow cytometer
  Back to [[Instruments and sensors to measure environmental parameters]] ...vidual cells to be deflected into different receptacles according to their optical characteristics. By the 1980’s, it was realised that flow cytometry had m
  7 KB (1,064 words) - 17:51, 29 June 2019
• Detecting the unknown - novelty detection of exceptional water reflectance spectra
  ...s in coastal waters can be performed by remote sensing using multispectral sensors on-board satellites. Many methods are in use which enable the detection and ...rent wavelengths, all of which will be used in the present algorithms. Bio-optical models often exclude several wavebands or give other wavelengths more weigh
  9 KB (1,381 words) - 15:36, 20 September 2020
• FerryBox - Continuous and automatic water quality observations along transects
  .... waves and currents, (2) bio-fouling can be more easily prevented (inline sensors), (3) no energy restrictions (in contrast to buoys), (4) easier maintenance ...pplied as well. The basic setup was extended to further sensors such as an optical nitrate sensor and an algal group detector as well as chemical analysers (a
  15 KB (2,302 words) - 17:48, 29 June 2019
• Dynamics and structure of the water and matter ex-change between the Wadden Sea and the German Bight
  ...or energy supply, data logger, telemetry units and standard meteorological sensors (Table 1). The overall length of the system amounts to some 15 metres, depe ...(SPMC) and chlorophyll fluorescence are derived by combination of indirect optical and acoustical detection methods with repeated sampling. SPMC of water samp
  13 KB (2,006 words) - 14:59, 2 July 2023
• Suspended particulate matter distribution in the North Sea
  ...ration depth is. One problem is also obvious: the algorithm to convert the optical information into SPM concentrations does not allow values greater than ~ 75 ...ing weather forecasts. Although the information retrieved from the optical sensors of satellites may not cover the whole North Sea due to cloud coverage, it i
  12 KB (1,825 words) - 22:56, 20 August 2020
• The Baltic Algae Watch System - a remote sensing application for monitoring cyanobacterial blooms in the Baltic Sea
  ...f vast areas on a regular basis in NRT. The main disadvantage is that most sensors cannot ”see” through clouds, which limits the monitoring ability at hig ...m at or close to the sea surface in the Baltic Sea is associated with high optical scattering properties rather than discolouring by absorption properties. Th
  25 KB (3,748 words) - 23:00, 21 August 2020
• Coastal observation systems
  ...r is pumped from a subsurface inlet into the measuring circuit of multiple sensors (see Diagram)). An important feature is the regular automated cleaning and ...ents (ammonia, nitrite/nitrate, o-phosphate, silicate). In the near future sensors for pCO2, alkalinity, a flow-cytometer and an instrument to measure genepro
  39 KB (5,933 words) - 22:32, 25 October 2020

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