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Sample krill (Euphausia superba) shape taken from McGehee et al. (1998)

Source: R/data.R
krill.Rd

A dataset containing a sample krill (Euphausia superba) body shape proposed by McGehee et al. (1998).

Usage

data(krill)

Format

A pre-generated FLS scatterer containing all information required for target strength modeling.

metadata

Relevant and identifying metadata (list).

model_parameters

Container for specified model parameters (list).

model

Model outputs and results (list).

body

A list with elements:

  • rpos: Position matrix (x, y, z; m).

  • radius: Radius of each discrete cylinder (m).

  • g: Body density contrast relative to medium.

  • h: Sound speed contrast relative to medium.

  • theta: Orientation angle (\(\theta_{body}\), radians).

shape_parameters

A list with:

  • length: Body length (m).

  • ncyl: Number of cylinders.

  • theta_units: Unit of orientation.

  • length_units: Unit of length.

Value

A pre-generated FLS scatterer object.

Examples

data("krill", package = "acousticTS")
krill
#> FLS-object
#>  Fluid-like scatterer 
#>  ID:Antarctic Euphausia superba (McGehee et al., 1998)
#> Body dimensions:
#>  Length:0.041 m(n = 14 cylinders)
#>  Mean radius:0.0013 m
#>  Max radius:0.002 m
#> Shape parameters:
#>  Defined shape:arbitrary
#>  L/a ratio:20.1
#>  Taper order:N/A
#> Material properties:
#>  g: 1.0357
#>  h: 1.0279
#> Body orientation (relative to transducer face/axis):1.571 radians