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    Evaluation of satellite derived spectral diffuse attenuation coefficients

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    INCHOE_2007_116.pdf (181.1Kb)
    Date
    2007
    Author
    Suresh, T.
    Talaulikar, M.
    Desa, E.
    Mascarenhas, A.A.M.Q.
    Matondkar, S.G.P.
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    Abstract
    Spectral diffuse attenuation K sub(d)(lambda) is an important apparent optical property that provide information about the attenuation of the spectral downwelling solar irradiance with depth in water. The spectral K sub(d)(lambda) at lambda = 412, 443, 490, 510, 555 and 670 nm derived from the ocean color satellite sensor, SeaWiFS with the in-situ measured values from the Arabian Sea is compared. The satellite derived values are found to be comparable to the measured values in the lower wavelengths and are found to deviate from the measured values in the red band of 670nm. It compared well for lower values of K sub(d) in the blue green bands and overestimated at larger values of K sub(d). The comparison is good within 20% of error for bands at 490 and 510 nm. This indicated that the estimation could provide large errors in the productive and coastal waters, which is attributed to the atmospheric correction procedures used for the retrieval of water leaving radiance and other related products.
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    http://drs.nio.org/drs/handle/2264/707
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