On the equivalence of near-surface methods to determine the water-leaving radiance
The equivalence of two radiometric methods relying on a single optical sensor to determine the water-leaving radiance , namely the Single Depth Approach (SDA) and the Sky-Blocked Approach (SBA), was investigated applying identical hyperspectral radiometers operated on the same deployment platform. Values of from SDA and SBA measurements performed in the Black Sea across a variety of waters during ideal illumination conditions and with low-to-slight sea state, exhibit average absolute differences within 0.5% in the blue-green spectral regions and of 2% in the red. This result, benefitting of a comprehensive parameterization of radiometric processes in combination with the characterization of sensors non-linearity, immersion factors and reproducibility of absolute radiometric calibrations, suggests the equivalence of the two near-surface methods in terms of performance and data reduction needs.
ZIBORDI Giuseppe;
TALONE Marco;
2020-01-24
OPTICAL SOC AMER
JRC117997
1094-4087 (online),
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-28-3-3200,
https://publications.jrc.ec.europa.eu/repository/handle/JRC117997,
10.1364/OE.28.003200 (online),
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