profile_catenary Class Reference
[Ocean Profiles]

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Detailed Description

Creates an analytic model for a deep sound channel profile.

The catenary form of this profile useful because its ray paths can be computed analytically and used to test propagation loss modeling accuracy against standard benchmarks. The general form of the deep duct catenary profile is defined as:

          c(z) = c1 * cosh( (z-z1) / g1 )
 where:
          z    = depth below the ocean surface  (positive direction down).
          c(z) = speed of sound as a function of depth
          z1   = depth of the deep sound channel axis
          c1   = speed of sound at the deep sound channel axis
          g1   = sound speed gradient scaling factor
 
References:
S.M. Reilly, M.S. Goodrich, "Geodetic Acoustic Rays in the Time Domain, Comprehensive Test Results", Alion Science and Technology, Norfolk, VA, September, 2006.

Constructor & Destructor Documentation

profile_catenary ( double  c1,
double  g1,
double  z1,
attenuation_model attmodel = NULL 
) [inline]

Default behavior for new profile models.

Parameters:
c1 Speed of sound at the deep sound channel axis.
g1 Sound speed gradient scaling factor.
z1 Depth of the deep sound channel axis.
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.

Member Function Documentation

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

double _depth1 [private]

Depth of the deep sound channel axis.

double _gradient1 [private]

Sound speed gradient scaling factor.

double _soundspeed1 [private]

Speed of sound at the deep sound channel axis.


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