Grid Size; Grid Resolution; Starting Data Collection; Laying Out The Grid - Radiodetection RD1500 Operation Manual

Ground penetrating radar with ultra wide band antenna

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Grid Scan

Grid Size

Press the + and - buttons under Grid Size at the bottom of the screen to change the dimensions

of the grid. Alternatively, you can press the + and - buttons on the screen beside Grid Size on

the upper part of the screen.

In metric units, the available grid sizes are 5m x 5m, 10m x 10m and 15m x 15m.

In US standard units, the available grid sizes are 10ft x 10ft, 20ft x 20ft and 50ft x 50ft

Grid resolution determines the spacing between grid lines. This can be varied by pressing the +

and - buttons under Grid Resolution at the bottom of the screen. Alternatively, you can press

the + and - buttons on the screen beside Grid Resolution on the upper part of the screen.

Available options are 0.25m, 0.5m and 1.0m in metric units and 1, 2 & 5 ft in US standard units.

The best images will result when the smallest resolution value is used.

Calculating Resolution

The size of target will determine line spacing. The RD1500 must pass over a target to detect it,

so line spacing needs to be of the order of the size of the target or smaller when practical. This

can be adjusted to a larger spacing for larger targets or targets that are linear. Tighter line

spacing does take longer to collect and the highest resolution may not be economically feasible

in all circumstances.

NOTE: The system will not allow you to select a 10ft x10ft grid with a low resolution of 5ft, as

this resulting image will be very poor due to inadequate data collected.

Press Start when all the parameters are set up and data collection is ready to begin

Positional accuracy of each line is vital to locating targets of interest once data has been

processed.

For linear targets such as pipes and utilities, the best GPR responses occur when the GPR

survey line crosses the target at right angles. Keep this in mind when laying out the grid and the

orientation

An example grid layout is shown in Figure 9-2.

RD1500 Operation Manual

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