Geophysical Survey Systems, Inc.
SIR® 4000
Manual
MN72-433 Rev F
84
Setting up the 3D Grid on Concrete
There are two options for setting your grid up for StructureScan3D. You can either
use a grid sheet that already has the lines printed on it or you can lay out your own
grid using chalk or paint and a measuring tape. Grid pads are available in 12” x
12” (30 cm x 30 cm), 24” x 24” (60 cm x 60 cm), or 24” x 48” (60 cm x 120 cm)
sizes. If you decide to setup your own grid ensure that it is a square or rectangle
and matches one of the preset Grid Dimensions and Line Spacing options.
Grid Menu
Grid Dimensions:
There are four possible grid sizes ranging from a 12” x 12”
to a 48” x 48” grid (30 cm x 30 cm to 100 cm x 100 cm).
Line Spacing:
This is the spacing between your survey lines and there are three
options, 1”, 2”, or 4” spacing (2.5 cm, 5 cm, or 10 cm). The printed 3D grid sheets
from GSSI have a 2” (5 cm) line spacing.
StructureScan3D File Structure
StructureScan3D mode creates a folder on your SIR 4000 with the name of the grid followed by the
extension 3DS. Inside of that folder are all of the DZT files, DZX files, and a file with the extension BZX.
The individual profiles are the DZT files and each one has a corresponding header filer, the DZX. The
BZX is a grid assembly file that tells RADAN how to assemble the individual files into a grid.
•
The BZX file is an information file which tells the RADAN software where each DZT file is
positioned and directs the software to create a 3D grid with the proper positioning information.
Opening the grid in RADAN is as simple as opening the BZX file.
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The project folder will also contain a subfolder called Proc. This folder contains DZP files that
are used to playback the 3D data on the SIR 4000. They are not necessary for 3D viewing or
processing in RADAN.
•
When transferring data from the SIR 4000 to a
PC running RADAN, the entire Grid folder is
transferred. In order for the BZX file to work
all of the DZT and DZX files must be kept in
the same folder as the BZX file.
In summary, each grid is saved in a separate folder under the project folder. Inside each folder are all of
the individual radar profiles (DZT and DZX files) and one BZX file. The BZX file tells RADAN where to
put each profile to create a 3D grid.
StructureScan3D Data Collection
Prior to starting a 3D grid you should perform a general survey of the area using StructureScan2D to
determine the best settings to use during data collection and the ideal grid orientation. It will speed up
data collection and interpretation if you already know which settings to adjust in the Radar menu as well
as how you’d like to change them.
Step 1: Start System
After system boot-up, select the StructureScan3D mode. Then select New Project to create a new project
folder. After naming the project and selecting Apply you will see the Setup screen with the menu on the
right, o-scope in the upper middle, data preview in the upper left, and a grid preview in the bottom center
of the screen.
Note
:
You must keep the BZX file and
all of your data files together in the same
grid folder.
Summary of Contents for SIR 4000
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