Trace Filter (2D)

Use the Trace Filter dialog to cull traces or parts of traces from the output files. Replace zeroed tops and bottoms of traces with dummies, so that you can visualize only the real data. Subsample the profile by modifying the Minimum, Maximum, or Step, for the CMP/Shot point or Z directions.

Trace Filter dialog options

Dummy top/bottom of traces matching this value

When checked, this enables you to specify a value (typically “0”) which is used to pad the top and/or bottom of traces. When one or more samples of this value are found at the top or bottom of a trace, they will be replaced with dummies in the output files.

Subsample profile

When checked, this enables the controls for windowing and decimating the profile along the horizontal or vertical axes.

CMP/Shot point

Select from the list of CMP or Shot points detected in the input SEG-Y profile, the Minimum and Maximum traces to be included in the output. By default, the first and last traces are selected.

Select the Step between traces, for the output. The default is to include every trace from the input SEG-Y volume. Choose from a list of integer multiples of the default value.

The spacing (in traces) and the profile length (Dimension) will be displayed to the right.

Z

Select from the list of all samples in the input SEG-Y traces, the Minimum and Maximum samples to be included in the output. By default, the first and last samples are selected.

Select the Step (sample increment) for the output files. The default is the sample interval in the input SEG-Y volume. Choose from a list of integer multiples of the default value.

The sample spacing (in ground units) and the vertical dimension of the volume (Dimension) will be displayed to the right.

[More]

Press this button to expand the dialog to include trace-header filters. Each filter will include or exclude traces based on the value in a specified trace header. All filters are combined using the logical AND operator, such that a trace must pass through all filters in order to be included in the output.

[+Add Filter]

Create a new filter:

  1. Select the trace header that is being filtered.
  2. Choose from one of the available conditions to be applied to the trace header value:
    • Equals
    • Not Equals
    • In Range
    • Not in Range
  3. Specify the limiting value or values being compared to the trace header value.

[Text Header]

Click this button to view the Text Header in a separate, read-only window.

[Binary Header]

Click this button to view the Binary Header in a separate, read-only window.

[Trace Viewer]

Click this button to view the Trace Viewer in a separate, read-only window, which allows you to view the trace headers and trace data for any selected trace.

Application Notes

Given a Minimum, Maximum and Step value for an axis, the last sample included in the output will be the largest integer multiple “i” of step such that:

Minimum+(i*Step)≤ Maximum.

See Also: