profile_munk Class Reference
[Ocean Profiles]

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Detailed Description

Creates an analytic model for the Munk profile, an idealized representation of a deep sound (SOFAR) channel.

The Munk profile is defined as:

          z' = 2 * (z-z1)/B ;
          c(z) = c1 * (1.0 + e * (z'-1.0+exp(-z'))) ;
 where:
          z    = depth below the ocean surface (positive direction down),
          z1   = depth of the deep sound channel axis,
          B    = depth scaling factor,
          c1   = sound speed on the deep sound channel axis,
          e    = perturbation coefficient,
          c(z) = speed of sound as a function of depth.
 
References:
W. H. Munk, "Sound channel in an exponentially stratified ocean, with application to SOFAR", J. Acoust. Soc. Amer. (55) (1974) pp. 220-226.

Constructor & Destructor Documentation

profile_munk ( double  axis_depth = 1300.0,
double  scale = 1300.0,
double  axis_speed = 1500.0,
double  epsilon = 7.37e-3,
attenuation_model attmodel = NULL 
) [inline]

Build Munk profile from its component parts.

Default to the profile parameters defined in Jensen, Kuperman, et. al.

Parameters:
axis_depth Depth of the deep sound channel axis (meters).
scale Depth scaling factor (meters).
axis_speed Sound speed on the deep sound channel axis (m/s).
epsilon Perturbation coefficient.
attmodel In-water attenuation model. Defaults to Thorp. The profile_model takes over ownship of this reference and deletes it as part of its destructor.
References:
F.B. Jensen, W.A. Kuperman, M.B. Porter, H. Schmidt, "Computational Ocean Acoustics", Figure 3.19 (b).

Member Function Documentation

double axis_depth (  )  [inline]

Depth of the deep sound channel axis (meters).

double axis_speed (  )  [inline]

Sound speed on the deep sound channel axis (m/s).

double epsilon (  )  [inline]

Perturbation coefficient.

double scale (  )  [inline]

Depth scaling factor (meters).

void sound_speed ( const wposition location,
matrix< double > *  speed,
wvector gradient = NULL 
) [virtual]

Compute the speed of sound and it's first derivatives at a series of locations.

Parameters:
location Location at which to compute sound speed.
speed Speed of sound (m/s) at each location (output).
gradient Sound speed gradient at each location (output).

Implements profile_model.


Member Data Documentation

const double _axis_depth [private]

Depth of the deep sound channel axis (meters).

const double _axis_speed [private]

Sound speed on the deep sound channel axis (m/s).

const double _epsilon [private]

Perturbation coefficient.

const double _scale [private]

Depth scaling factor (meters).


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