Block X: Signal Replica Parameters

The first three lines of this block defines the sampling of the environmental parameters for replicas and resolution bounds. This block is the only one that differs from the OASN format. The first line specifies the source coordinates and level used for generating the environmental replicas, in the same format used for the discrete sources in Block IX.

The next two lines identifies the environmental parameters searched, and specifies the sampling:

LY1:

Layer number for parameter 1.

PA1:

Parameter number (1: depth, 2: Cp, 3: Cs, 4: Ap, 5: As, 6: Rho)

VMIN1:

Minimum value of parameter 1

VMAX1:

Minimum value of parameter 1

NV1:

Number of samples in parameter 1

The wavenumber sampling parameters for the replica 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.