Optical closure for remote-sensing reflectance based on accurate radiative transfer approximations: the case of the Changjiang (Yangtze) River Estuary and its adjacent coastal area, China
| Autor: | Fang Shen, Leonid Sokoletsky |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
geography
geography.geographical_feature_category genetic structures Remote sensing reflectance IOPS Estuary eye diseases Closure (computer programming) Attenuation coefficient Radiative transfer Yangtze river General Earth and Planetary Sciences Environmental science Radiometric dating sense organs Remote sensing |
| Zdroj: | International Journal of Remote Sensing. 35:4193-4224 |
| ISSN: | 1366-5901 0143-1161 |
| Popis: | Optical closure exercises are pivotal for evaluating the accuracy of water quality remote-sensing techniques. The agreement between radiometrically derived and inherent optical property (IOP)-derived above-water spectral remote-sensing reflectance Rrs(λ) is necessary for resolving IOPs, the diffuse attenuation coefficient, and biogeochemical parameters from space. We combined spectral radiometric and IOP measurements to perform an optical closure exercise for two optically contrasting Chinese waters – the Changjiang (Yangtze) River Estuary and its adjacent coastal area in the East China Sea. The final aim of our investigation was to compare two derivations of Rrs(λ): Rrs(λ), derived from radiometric measurements; and Rrs(λ), derived from simultaneous IOP measurements. Five subsequent steps have been taken to achieve this goal, including (1) estimation of the Rrs(λ) from radiometric measurements; (2) scattering correction for the non-water spectral absorption coefficient apd(λ); (3) estimation of the below... |
| Databáze: | OpenAIRE |
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