Block IX: Discrete Noise and Signal Sources

If NDNS>0, then this block should first contain the coordinates and source level for each discrete source. Note that the depth is specified first in meters, followed by the x- and y-ranges in kilometer (in contrast to the array element coordinates which were all given in meters).

The source levels DNLEV are interpreted in two different ways, dependent on whether specified value is positive or negative:

DNLEV:

Level in dB of white source spectrum.

DNLEV<0:

A negative value identifies a logical unit of a file containing the frequency dependence of the source level. The format of the source level files is described in Section 11.1.11.

The wavenumber sampling parameters for the discrete sources should follow in the standard OASES format. In Version 2.2 automatic sampling is supported, and activated by NW=-1. In this case Ic1 and IC2 are insignificant. As is the case for automatic sampling in all OASES modules, the desired phase velocity interval must be specified manually. The kernel tapering invoked by the automatic sampling will be initiated at the specified phase velocities.