SPX Radiodetection RD1100 Operation Manual page 38

During back-up mode, there will be two indicators:

Position Indicator: The red vertical line corresponds to the location at the center of the
GPR sensor. As you pull the cart backwards, the Position Indicator moves to mark the
current location of the cart in the image and a box appears with the current position, relative
to the start of the line, listed as the top number.

Depth Indicator: A short red horizontal line corresponds to the current depth value, as
shown in the bottom number in the box. To determine the depth of an object, move the
indicator up or down by dragging the horizontal line to the desired location (Figure 8-3).
Alternatively, you can also use the Up and Down arrows on the 4-way directional keypad.
NOTE: make sure you have done a Soil Cal to ensure depth accuracy (see Section 8.6).
To locate a feature, simply roll the system back along the same path until the red vertical line is
exactly over the response (usually a hyperbola). You can mark the location of the object on the
surface and continue data collection. Once you reach the point where you initially started
backing-up, the system will continue acquiring new data.
You can also obtain depth and position information anywhere on the Line Scan by touching the
screen and holding for a second. A cross-hair appears where you touched the screen, with a
box displaying the position and depth (Figure 8-4). To get the position and depth information
about a different point on the screen, simply touch and drag the box or cross-hair to the desired
position.
Figure 8-4: Touch screen to get depth and horizontal position at any point
© Radiodetection 2016 33 RD1100 Operation Manual
Data Collection