Results 21 to 30 of about 975,462 (135)

Unsupervised Optical Classification of the Seabed Color in Shallow Oligotrophic Waters from Sentinel-2 Images: A Case Study in the Voh-Koné-Pouembout Lagoon (New Caledonia)

open access: yesRemote Sensing, 2022
Monitoring chlorophyll-a concentration or turbidity is crucial for understanding and managing oligo- to mesotrophic coastal waters quality. However, mapping bio-optical components from space in such shallow settings remains challenging because of the ...
Guillaume Wattelez   +2 more
doaj   +1 more source

Wave Effects of the Fractional Shallow Water Equation and the Fractional Optical Fiber Equation

open access: yesFrontiers in Applied Mathematics and Statistics, 2022
The non-linear space-time fractional Estevez-Mansfield-Clarkson (EMC) equation and the non-linear space-time fractional Ablowitz-Kaup-Newell-Segur (AKNS) equation showed the motion of waves in the shallow water equation and the optical fiber equation, respectively.
Sirasrete Phoosree, Weerachai Thadee
openaire   +3 more sources

Bottom Reflectance in Ocean Color Satellite Remote Sensing for Coral Reef Environments

open access: yesRemote Sensing, 2015
Most ocean color algorithms are designed for optically deep waters, where the seafloor has little or no effect on remote sensing reflectance. This can lead to inaccurate retrievals of inherent optical properties (IOPs) in optically shallow water ...
Martina Reichstetter   +5 more
doaj   +1 more source

Bio-optical properties of the Brazilian Abrolhos Bank’s shallow coral-reef waters

open access: yesFrontiers in Remote Sensing, 2022
The Abrolhos Bank harbors the richest coral reef ecosystem in the South Atlantic Ocean. It exhibits unique geomorphologic structures, is localized in shallow depths, and is divided into two reef regions with an inner arc close to the coast (3–20 m depth) and an outer deeper arc (5–30 m depth).
Medeiros   +10 more
openaire   +3 more sources

Development of Kd(490) Algorithm Using Medium Spatial Resolution Landsat 8 OLI Arround Shallow Waters In Panggang Island [PDF]

open access: yes, 2021
The state of water quality around Panggang Island, Seribu Islands, in recent decades experienced degradation caused by human activities. The parameters of the diffuse attenuation coefficient (Kd) is an important optical property-related attenuation of ...
Asriningrum, Wikanti   +5 more
core   +1 more source

Estimating specific inherent optical properties of tropical coastal waters using bio-optical model inversion and in situ measurements: case of the Berau estuary, East Kalimantan, Indonesia [PDF]

open access: yes, 2010
Specific inherent optical properties (SIOP) of the Berau coastal waters were derived from in situ measurements and inversion of an ocean color model. Field measurements of water-leaving reflectance, total suspended matter (TSM), and chlorophyll a (Chl a)
C. M. Mannaerts   +8 more
core   +1 more source

Dependence of Attenuation Coefficients on Optical Condition of Shallow Water

open access: yesJournal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 2009
Radiative transfer of visible light in optically shallow water is an important process for remote sensing and environmental research. It has been modeled using various attenuation coefficients. Although these coefficients are apparent optical properties (AOPs) of water, which are supposed to be dependent not only on the water quality but on other ...
KANNO, Ariyo   +2 more
openaire   +2 more sources

SWIM: A Semi-Analytical Ocean Color Inversion Algorithm for Optically Shallow Waters [PDF]

open access: yes, 2014
Ocean color remote sensing provides synoptic-scale, near-daily observations of marine inherent optical properties (IOPs). Whilst contemporary ocean color algorithms are known to perform well in deep oceanic waters, they have difficulty operating in ...
Weeks, Scarla J.   +7 more
core   +2 more sources

Underwater acoustic signal acquisition based on optical interferometry in shallow water

open access: yesAUT Journal of Electrical Engineering, 2023
Here, it is investigated the results of the implementation of an interferometric optical fiber acoustic sensor based on fiber Bragg grating (FBG). It is investigated the importance of different types of interferometer configurations as Michelson or Mach-Zehnder interferometers on the signal to noise ratio.
Abniki, Aliasghar   +2 more
openaire   +2 more sources

Satellite-derived bathymetry in optically complex waters using a model inversion approach and Sentinel-2 data [PDF]

open access: yes, 2020
This study presents an assessment of a model inversion approach to derive shallow water bathymetry in optically complex waters, with the aim of both understanding localised capability and contributing to the global evaluation of Sentinel-2 for coastal ...
Hedley, John D.   +11 more
core   +1 more source

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