292
H.R. Gordon
Fig. 17.1 Location of stations used in the development and the validation of CZCS imagery. From
Gordon et al. (1983)
Fig. 17.2 Left: examples of water-leaving radiance spectra for several pigment concentrations.
From Hovis et al. (1980). Reprinted with permission from the AAAS. Right: the blue-green
algorithm used to retrieve the pigment concentration. From Gordon et al. (1983)
should be possible to retrieve C with an uncertainty of about 30% over the range
0.029 ≤ C ≤ 5.4 mg/m
3 . This was far better than I had thought possible.
17.2.2 Atmospheric Correction
My earliest thoughts about atmospheric correction (about 1976) were derived on
the basis of solving the radiative transfer equation in the simplest of cases (single scattering). In this approximation the radiance (L t ) reaching the sensor can be
decomposed into atmospheric components due to Rayleigh scattering (L r ), aerosol
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