GSSI SIR 4000, Manual

Page: 77 / 163

Geophysical Survey Systems, Inc. SIR® 4000
Manual
MN72-433 Rev F 71
Quick3D Playback Options
The Playback Screen allows you to view
individual 2D profiles in a grid format, rotate
the grid to view data from different angles,
apply filters, change colors, and do hyperbola
fitting. If you’re still in the field you also have
the ability to recollect lines in the grid. These
options are all available through the Toolbar
located at the bottom of the screen.
View Toggle
Pressing the View Toggle button at the bottom
of the screen switches the 3D grid displayed to
either a top-down view of the data, a view of
both the 2D profile and 3D slice, or the only
individual 2D profiles. These options are
available under the Output Menu in the
Toolbar.
Gain
This Gain option is also referred to as display
gain. It increases the amplitude of your data by
multiplying every sample throughout your scan
by a constant value. The result is that you will
be able to better see weaker reflections, but
those already strong reflections may be over-
gained. This function is useful for a quick
viewing of data that is attenuated or otherwise
under-gained to guarantee that it was not
clipped.
•
You can change Gain from -12 to 60,
with negative values weakening the
entire signal and positive values
strengthening the signal by the value
shown.
•
To modify Gain press the Gain control
button and use either the Control Knob
or Right/Left Arrow keys to adjust the
gain amount.
•
Display Gain is only for display and is
not saved with the data.
Fence X and Y
Profiles that were collected in either the X or Y direction or both can be viewed during Playback.
•
Press this soft key to select profiles to display.
•
Use the Control Knob to view different profiles.