Unmixing of spectral components affecting AVIRIS imagery of Tampa Bay
Carder, K.L.; Lee, Z.P.; Chen, R.F.; Davis, C.O. (1993). Unmixing of spectral components affecting AVIRIS imagery of Tampa Bay, in: Vane, G. (Ed.) Imaging spectrometry of the terrestrial environment, 11-16 April 1993, Orlando, FL, United States. Proceedings of SPIE, the International Society for Optical Engineering, 1937: pp. 77-90. https://dx.doi.org/10.1117/12.157045
In: Vane, G. (Ed.) (1993). Imaging spectrometry of the terrestrial environment, 11-16 April 1993, Orlando, FL, United States. Proceedings of SPIE, the International Society for Optical Engineering, 1937. SPIE: Bellingham. ISBN 0819411736. 272 pp., more
In: Proceedings of SPIE, the International Society for Optical Engineering. SPIE: Bellingham, WA. ISSN 0277-786X; e-ISSN 1996-756X, more
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Document type: Conference paper
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- Carder, K.L.
- Lee, Z.P.
- Chen, R.F.
- Davis, C.O.
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| Abstract |
According to Kirk's as well as Morel and Gentili's Monte Carlo simulations, the popular simple expression, R approximately equals 0.33 bb/a, relating subsurface irradiance reflectance (R) to the ratio of the backscattering coefficient (bb) to absorption coefficient (a), is not valid for bb/a > 0.25. This means that it may no longer be valid for values of remote-sensing reflectance (above-surface ratio of water-leaving radiance to downwelling irradiance) where Rrs4/ > 0.01. Since there has been no simple Rrs expression developed for very turbid waters, we developed one based in part on Monte Carlo simulations and empirical adjustments to an Rrs model and applied it to rather turbid coastal waters near Tampa Bay to evaluate its utility for unmixing the optical components affecting the water- leaving radiance. With the high spectral (10 nm) and spatial (20 m2) resolution of Airborne Visible-InfraRed Imaging Spectrometer (AVIRIS) data, the water depth and bottom type were deduced using the model for shallow waters. This research demonstrates the necessity of further research to improve interpretations of scenes with highly variable turbid waters, and it emphasizes the utility of high spectral-resolution data as from AVIRIS for better understanding complicated coastal environments such as the west Florida shelf. |
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