Sample sardine shape with fully inflated swimbladder

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

Usage

data(sardine)

Format

A named list with the following components:

metadata

Relevant and identifying metadata (list).

model_parameters

Specified model parameters (list).

model

Model outputs and results (list).

body

A list with:

• rpos: Position matrix (x, yw, zU, zL; m).

• sound_speed: Flesh sound speed (\(c_{body}\), m/s).

• density: Flesh density (\(\rho_{body}\), kg/m\(^3\)).

• theta: Orientation relative to transducer (\(\theta_{body}\), radians).

bladder

A list with:

• rpos: Position matrix (x, yw, zU, zL; m).

• sound_speed: Bladder sound speed (\(c_{bladder}\), m/s).

• density: Bladder density (\(\rho_{bladder}\), kg/m\(^3\)).

• theta: Orientation relative to transducer (\(\theta_{bladder}\), radians).

shape_parameters

A named list with:

• body: A list describing the body:

  • length: Body length (m).

  • ncyl: Number of discrete cylinders.

  • theta_units: Units for orientation angle.

  • length_units: Units for length.

• bladder: A list describing the swimbladder:

  • length: Bladder length (m).

  • ncyl: Number of discrete cylinders.

  • theta_units: Units for orientation angle.

  • length_units: Units for length.