Remote sensing reflectance and inherent optical properties of oceanic waters derived from above-water measurements

Zhongping Lee; Kendall L. Carder; Robert G. Steward; Thomas G. Peacock; Curtiss O. Davis; James L. Mueller

doi:10.1117/12.266436

6 February 1997 Remote sensing reflectance and inherent optical properties of oceanic waters derived from above-water measurements

Zhongping Lee, Kendall L. Carder, Robert G. Steward, Thomas G. Peacock, Curtiss O. Davis, James L. Mueller

Author Affiliations +

Proceedings Volume 2963, Ocean Optics XIII; (1997) https://doi.org/10.1117/12.266436
Event: Ocean Optics XIII, 1996, Halifax, Nova Scotia, Canada

Abstract

Remote-sensing reflectance and inherent optical properties of oceanic properties of oceanic waters are important parameters for ocean optics. Due to surface reflectance, R_rs or water-leaving radiance is difficult to measure from above the surface. It usually is derived by correcting for the reflected skylight in the measured above-water upwelling radiance using a theoretical Fresnel reflectance value. As it is difficult to determine the reflected skylight, there are errors in the Q and E derived R_rs, and the errors may get bigger for high chl_a coastal waters. For better correction of the reflected skylight,w e propose the following derivation procedure: partition the skylight into Rayleigh and aerosol contributions, remove the Rayleigh contribution using the Fresnel reflectance, and correct the aerosol contribution using an optimization algorithm. During the process, R_rs and in-water inherent optical properties are derived at the same time. For measurements of 45 sites made in the Gulf of Mexico and Arabian Sea with chl_a concentrations ranging from 0.07 to 49 mg/m³, the derived R_rs and inherent optical property values were compared with those from in-water measurements. These results indicate that for the waters studied, the proposed algorithm performs quite well in deriving R_rs and in- water inherent optical properties from above-surface measurements for clear and turbid waters.

Citation Download Citation

Zhongping Lee, Kendall L. Carder, Robert G. Steward, Thomas G. Peacock, Curtiss O. Davis, and James L. Mueller "Remote sensing reflectance and inherent optical properties of oceanic waters derived from above-water measurements", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); https://doi.org/10.1117/12.266436

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