Ruddick <i>et al</i>. [Appl. Opt. <b>39,</b> 897 (2000)] extended the standard SeaWiFS atmospheric-correction algorithm for use over turbid coastal and inland waters. However, Ruddick’s method is based on the assumption of a spatially homogeneous constant ratio for the water-leaving reflectances normalized by the sun-sea atmospheric transmittance at 765 and 865 nm. Such first-order <i>b<sub>b</sub>/a</i> model-based assumption can result in an inaccuracy for highly turbid water. Using the first- and second-order <i>b<sub>b</sub></i>/(<i>a</i> + <i>b<sub>b</sub></i>) models as well as the second-order <i>b<sub>b</sub>/a</i> model (which, more realistically, do not assume spatial homogeneity ratio), we suggest using the modified assumption, <i>R</i><sup>(8)−1</sup> = α<sub>0</sub><i>R</i><sup>(7)−1</sup> + (<i>l</i><sub>1</sub><i>Q</i>)<sup>−1</sup> (1 − α<sub>0</sub>), instead of Ruddick’s assumption, in SeaWiFS atmospheric-correction algorithms for highly turbid waters.
© 2003 Optical Society of America
Yan Li, "Atmospheric Correction of SeaWiFS Imagery for Turbid Coastal and Inland Waters: Comment," Appl. Opt. 42, 893-895 (2003)