GSSI StructureScan Mini XT, Manual

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Geophysical Survey Systems, Inc. StructureScan™ Mini XT
Manual
MN 70-813 Rev E 13
Slicing
To slice through the data, select a viewpoint which
shows a clear image of the horizontal plane. Move
your finger along the Slicing Bar to drag the view
slice thought the data. To jump to a particular depth,
just tap the slicing bar at point corresponding to the
desired depth.
As you slice, note the slice depth information
displayed above the grid view. You will see the
Slice Top depth and Bottom depth. This means that
everything between those two values is displayed in
the current view. In full thickness Slice mode, the
Top value will be fixed at the surface (0).
Press the screen to reveal a crosshair you can then
manipulate with your finger.
Refining the Image
The grid data are being processed with a technique called “migration.” Migration will remove the tails
from the hyperbolas and collapse them back to the target’s central point. It is very useful as a tool for
tightening up the 3D image. Migration requires you to have the correct dielectric value of the concrete.
The best way to do this is to take a test scan in the ScanMax app and use one of the depth calibration
methods to calculate the correct value. Please see the ScanMax
section for details.
If you do not know the dielectric, then you can modify it during
while playing back data. Toggle to the 2D linescan viewpoint. You
will see an image like the one at the right. This shows a single grid
line with raw hyperbolas on the bottom and processed, focused
targets on the top.
The top data focus quality depends on the using the correct
dielectric. The goal is to have the top image show as a series of small
dots at the locations of the hyperbolas. The image at the right shows
a correct value. If the top image contains hyperbolas, or upside-down
hyperbolas, use your finger to drag the left scale bar up and down
until the shapes collapse into tight dots.
When you are satisfied with the result, click Viewpoint to return to
the grid view. It will take a few moments to regenerate the grid
image, so please be patient.
Focused
Data
Raw Data