Sensors & Software LMX100, User Manual, Page: 45 / 97

Data Collection
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6 Data Collection
GPR data is collected along a straight line, and allows the operator to view it as a cross-section
image. The operator can locate a feature and easily back-up and mark the location of that
object on the ground. The operator can identify the alignment of subsurface features, check for
linearity and acquire accurate depth measurements.
From the main screen, press the Start button; you will see the screen shown in Figure 6-1.
Figure 6-1: Data Collection screen
The GPS Status Indicator (lower left in Figure 6-1) shows the quality of the GPS signal, which is
based on the number of satellites that it sees. The chart below explains what the colours and
bars mean:
Indicator Color # of bars # of Satellites
Red 1 4
Orange 2 5
Green 3 6,7
Green 4 8,9
Green 5 10+
6.1 Acquiring Data
The system is ready to collect data as soon as you see this screen. As the system is pushed
along a straight line, the collected GPR data scrolls onto the screen from the right and moves to
the left (Figure 6-2).
The depth scale along the side of the GPR Line image and the position scale along the top of the
image are set to Metric or US Standard units based on the setting in the Preferences menu.