User's Manual

GPR4 Utility Scanner

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User Manual

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Earth Science Systems, LLC

October

2019

Page 14 of 27

c. Local Frame Parameters Select the distance Units (feet or meters). Enter the

bearing of the first survey line in the Line 1 Azimuth field. The software will use

this value to correctly orient images on maps that are exported as KMZ or HTML

files.

8. Move the scanner to the start position of the line. Press the Previous line button

until the proper line number is displayed at the top of the screen. This action can also be

accomplished by pressing the rocker button on the radar unit to the left momentarily.

Each time this button is pressed, the system runs through a line initialization sequence

which tasks a few seconds. When the user hears an audible beep from the tablet, the

initialization sequence has completed. Therefore, users should wait until the audible

beep is heard before another line request.

9. The GPR data can be recorded for later playback and examination if desired. When

locating intersecting conduits, some users may choose not to record the data. Select

File, New, and then choose a location and name for the database file. When ready to

begin the survey, press the Record data button . This action can also be

accomplished by pressing the rocker switch on the radar unit up momentarily. The

button should appear activated to indicate that data are being recorded. Move the cart

along the survey line to conduct the survey.

10. Move the cart along the survey line until the scanner moves beyond the object of

interest. Roll the scanner backwards on the line until the scanner is positioned directly

over the object and mark the position on the surface with a marker. While recording

data, a marked fiducial can be placed in the datafile by pressing the icon.

11. If data recording was enabled, press the Record data button to turn off recording

after the cart has traversed the entire survey line. The button should appear inactivated.

12. If no further surveys are to be conducted, power down the sensor and odometer.

Disassemble the survey cart and return all components to the shipping case.

5.3 Conduct a 3D Survey

Users usually conduct 3D scans when depth slices or 3D views of the subsurface are

desired. To conduct a 3D survey, proceed as follows.

Figure 6. Jobsite information dialog.