Identifying Air Wave Reflections - Sensors & Software Noggin 100 User Manual

12-Locate & Mark Mode Noggin

12.3.3 Identifying Air Wave Reflections

Some hyperbolas in the image can be caused by objects that are not in the subsurface, such as
posts, fences, overhead wires and even trees.
An important part of understanding the data image is learning to recognize these unwanted "air"
targets and differentiate them from the targets in the ground.
One way of identifying air reflections is to use the target hyperbola method described above.
However, hyperbolas from above-ground objects are wider than objects in the ground and out of
the range of the maximum Soil Type.
Therefore, if the widest Indicator Hyperbola is still not wide enough to match the target hyperbola,
the target hyperbola is likely from an object in the air, not the ground.
62