Even if a spot testing is needed, it is recommended generating a 2D cross section by using a small survey interval (e.g., 0.05 m), which will make multiple measurements (e.g., > 5) to enhance overall interpretation of the result. Because the entire system can move easily, survey speed can be extremely fast. For example, a few tens of measurements (e.g., 20-40) can be made during a 1-minute survey with a small survey interval (e.g., 0.05 m). It can also survey a relatively long distance (e.g., 50 m) in a fast mode if all acquisition components, such as seismograph, laptop, battery, etc., are properly harnessed in a small wheeled device (e.g., cart or wagon).
Previously, Tapper-64 (T-64) was developed that is harnessed on the back of a pickup truck, which can survey the pavement in a non-stop rolling mode (e.g., 30 MPH).
Tapper-64 Rolling SeisMike System (Minnesota Department of Transportation, MnDOT)
Similar rolling SeisMike system with single or multiple (e.g., 2-4) arrays is under development by re-inventing the rolling impact source of T-64 in its controllability (e.g., impact rate and strength).
