A pre-generated SBF scatterer containing all information required for target
strength modeling. The packaged object corresponds to the historical
Atlantic cod example used in the KRM literature and matches the Cod D case
archived in the echoSMs KRM shape collection.
Usage
data(cod)Format
A pre-generated SBF 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
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
List with:
rpos: Position matrix (x, yw, zU, zL; m).sound_speed: Flesh sound speed (\(c_{bladder}\), m/s).density: Flesh density (\(\rho_{bladder}\), kg/m\(^3\)).theta: Orientation relative to transducer (\(\theta_{bladder}\), radians).
- shape_parameters
Named list with:
body: List with length (m), ncyl (int), theta_units (str), length_units (str).bladder: List with length (m), ncyl (int), theta_units (str), length_units (str).
Source
Historical KRM cod shape collection archived in echoSMs
(https://github.com/ices-tools-dev/echoSMs) and associated with the
Clay and Horne Atlantic cod example.
References
Clay, C.S., and Horne, J.K. (1994). Acoustic models of fish: The Atlantic cod (Gadus morhua). The Journal of the Acoustical Society of America, 96, 1661-1668. doi:10.1121/1.410245