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Phase-compensated distorted wave Born approximation (PCDWBA)

Source: R/model-pcdwba.R
PCDWBA.Rd

Computes backscatter from weakly scattering elongated fluid-like targets using the phase-compensated distorted wave Born approximation (PCDWBA) described by Chu and Ye (1999). This model is particularly suited to uniformly bent or gently curved cylindrical bodies with tapered ends, but it can also operate on arbitrary fluid-like centerline profiles stored in FLS objects.

Usage

This model is accessed via:


target_strength(
  ...,
  model = "PCDWBA",
  sound_speed_sw,
  density_sw,
  radius_curvature,
  radius_curvature_ratio
)

Arguments

sound_speed_sw

Seawater sound speed (\(m~s^{-1}\)).

density_sw

Seawater density (\(kg~m^{-3}\)).

radius_curvature

Optional radius of curvature (\(m\)) used to rebuild a uniformly bent centerline for canonical cylinders.

radius_curvature_ratio

Optional radius of curvature divided by body length (\(\rho_c / L\)) used to rebuild a uniformly bent centerline for canonical cylinders.

References

Chu, D., and Ye, Z. (1999). A phase-compensated distorted wave Born approximation representation of the bistatic scattering by weakly scattering objects: Application to zooplankton. The Journal of the Acoustical Society of America, 106, 1732-1743.

Stanton, T.K. (1989). Sound scattering by cylinders of finite length. III. Deformed cylinders. The Journal of the Acoustical Society of America, 86, 691-705.