Geophysical Survey Systems, Inc.
SIR® 20
Manual
MN92-078 Rev F
60
6
Open data file. Go to File > Open and find the pad file that you collected. It will have the root name
of your project and a number tag. All GPR data files will have the file extension .dzt.
7
Because of StructureScan data collection settings, the display gain will initially be very weak. To
increase the display gain to better view data: right click in data window and increase gain.
Figure 63: Display Gain.
8
Check data to make sure it has all (26) end line marks, and all (26)
surface hyperbolas.
Figure 64: File Description .
9
If any end line marks are missing, see Adding and Editing Marks at the end of this section.
10
Click StructureScan Process Data File
. You will be asked to choose a radar wave velocity for the
migration. Migration shrinks the legs of the point reflector hyperbolas enabling accurate Depth Slice
imaging. This function will correct for Surface Position (Time 0), filter, and migrate data.
11
Assess migration. If not satisfied with migration effect, change the Radar Wave Velocity value and
re-run on the raw data file.
12
Once you have the correct migration value, click the StructureScan Depth slice icon
to view a C-
Scan data display. This function is discussed in C-Scan Display of Data and Joining Grids.
Summary of Contents for SIR 20
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