Multi-offset analysis for man-made structures

Johannes Hugenschmidt

doi:10.1117/12.383604

27 April 2000 Multi-offset analysis for man-made structures

Johannes Hugenschmidt

Proceedings Volume 4084, Eighth International Conference on Ground Penetrating Radar; (2000) https://doi.org/10.1117/12.383604
Event: 8th International Conference on Ground Penetrating Radar, 2000, Gold Coast, Australia

Abstract

Various approaches have been suggested for velocity analysis on man-made structures, such as the evaluation of reflection amplitudes and diffraction hyperbolas, calibration using cores and multi-offset analysis with different antenna types and acquisition setups. As none of these methods can be considered best under all circumstances, a choice has to be made for each given problem. Feasibility, cost and accuracy have to be considered when making this choice. This paper describes the benefits and limits of multi-offset velocity analysis using two ground/object-coupled 1.5 GHz antennas (GSSI, Model 5100). One of these antennas is off-the-shelf, the other one was purpose-built in order to increase the possible range of offsets. Important factors such as depth of penetration, vertical resolution, offset range and the number of scans required are discussed using datasets acquired on-site and in the laboratory. The emphasis is on asphalt pavements and concrete structures. This paper aims to provide support for decisions on whether this approach is suitable for a given problem.

Citation Download Citation

Johannes Hugenschmidt "Multi-offset analysis for man-made structures", Proc. SPIE 4084, Eighth International Conference on Ground Penetrating Radar, (27 April 2000); https://doi.org/10.1117/12.383604

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