scholarly journals Characterization of Particle Backscattering of Global Highly Turbid Waters From VIIRS Ocean Color Observations

2017 ◽  
Vol 122 (11) ◽  
pp. 9255-9275 ◽  
Author(s):  
Wei Shi ◽  
Menghua Wang
Keyword(s):  
Ocean Color ◽  
Turbid Waters ◽  
Particle Backscattering

scholarly journals Comparison of Above-Water Seabird and TriOS Radiometers along an Atlantic Meridional Transect

2020 ◽  
Vol 12 (10) ◽  
pp. 1669
Author(s):  
Krista Alikas ◽  
Viktor Vabson ◽  
Ilmar Ansko ◽  
Gavin H. Tilstone ◽  
Giorgio Dall’Olmo ◽  
...  
Keyword(s):  
State Of The Art ◽  
Ocean Color ◽  
Percentage Difference ◽  
Wide Range ◽  
Before And After ◽  
Reference Measurements ◽  
Satellite Ocean Color ◽  
Good Agreement

The Fiducial Reference Measurements for Satellite Ocean Color (FRM4SOC) project has carried out a range of activities to evaluate and improve the state-of-the-art in ocean color radiometry. This paper described the results from a ship-based intercomparison conducted on the Atlantic Meridional Transect 27 from 23rd September to 5th November 2017. Two different radiometric systems, TriOS-Radiation Measurement Sensor with Enhanced Spectral resolution (RAMSES) and Seabird-Hyperspectral Surface Acquisition System (HyperSAS), were compared and operated side-by-side over a wide range of Atlantic provinces and environmental conditions. Both systems were calibrated for traceability to SI (Système international) units at the same optical laboratory under uniform conditions before and after the field campaign. The in situ results and their accompanying uncertainties were evaluated using the same data handling protocols. The field data revealed variability in the responsivity between TRiOS and Seabird sensors, which is dependent on the ambient environmental and illumination conditions. The straylight effects for individual sensors were mostly within ±3%. A near infra-red (NIR) similarity correction changed the water-leaving reflectance (ρw) and water-leaving radiance (Lw) spectra significantly, bringing also a convergence in outliers. For improving the estimates of in situ uncertainty, it is recommended that additional characterization of radiometers and environmental ancillary measurements are undertaken. In general, the comparison of radiometric systems showed agreement within the evaluated uncertainty limits. Consistency of in situ results with the available Sentinel-3A Ocean and Land Color Instrument (OLCI) data in the range from (400…560) nm was also satisfactory (−8% < Mean Percentage Difference (MPD) < 15%) and showed good agreement in terms of the shape of the spectra and absolute values.

Detection, identification and mapping of cyanobacteria — Using remote sensing to measure the optical quality of turbid inland waters

1994 ◽  
Vol 45 (5) ◽  
pp. 801 ◽  
Author(s):  
DLB Jupp ◽  
JTO Kirk ◽  
GP Harris
Keyword(s):  
Remote Sensing ◽  
Algal Species ◽  
Optical Quality ◽  
High Spectral Resolution ◽  
Turbid Waters ◽  
Eastern Australia ◽  
Processing Techniques ◽  
Compact Airborne Spectrographic Imager

The advantages of airborne scanning for the detection, identification and mapping of algal species, cyanobacteria and associated water parameters (such as turbidity) can be realized if current research outcomes are developed into operational methods based on images with high spectral resolution. Evidence for this has become available through data obtained recently in Australia from the Compact Airborne Spectrographic Imager. This paper shows how pigments associated with cyanobacteria are detectable, even in the very turbid waters typical of eastern Australia. It demonstrates how, if the waterbodies and their constituents can be characterized by a programme of field and laboratory measurement, current processing techniques and models allow the concentrations of different constituents (algae and particles) in the photic zone to be estimated and mapped. The challenge for operational remote sensing of optical water quality in Australia (and throughout the world) is seen to have two components. One is to provide an effective characterization of the target inland and adjacent coastal waters and the other is to streamline the data analysis to provide maps of water properties in the time and cost frameworks required for operational use.

Characterization of Submesoscale Turbulence in the East/Japan Sea Using Geostationary Ocean Color Satellite Images

2019 ◽  
Vol 46 (14) ◽  
pp. 8214-8223 ◽  
Author(s):  
J. Choi ◽  
Y.‐G. Park ◽  
W. Kim ◽  
Y. H. Kim
Keyword(s):  
Satellite Images ◽  
Ocean Color ◽  
Japan Sea

scholarly journals Radiometric characterization of the ROCSAT Ocean Color Imager

1999 ◽  
Vol 20 (17) ◽  
pp. 3247-3263 ◽  
Author(s):  
Wei-Song Lin ◽  
Jenn-Yii Wu ◽  
Heng-Je Chiu ◽  
Chun-Sheng Chen ◽  
Yu-Jen Chang
Keyword(s):  
Ocean Color

Prelaunch characterization of the Geostationary Ocean Color Imager

2009 ◽  
Author(s):  
Seongick Cho ◽  
Yu-Hwan Ahn ◽  
Hee-Jeong Han ◽  
Joo-Hyung Ryu
Keyword(s):  
Ocean Color
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