FIG. 7. School target strengths [Eq. (6)] for both the single scattering (top row) and multiple scattering solutions (bottom row) and for the three school types: Poisson distributed (left-most column), nearest neighbor in range only (center column), and nearest neighbor criterion accounting for both range and bearing (right column). In each figure, red indicates higher target strength and blue indicates lower target strength with a variation from 22 to þ22 dB. Frequency increases logarithmically from the center. The angular coordinate indicates the angle of ensonification in the horizontal plane; black dots in the center of each image represent simulated fish locations for one realization of the school to provide a frame of reference.
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