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Signal Processing of GPR Data for Road Surveys

1
Department of Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
2
School of Computing and Engineering, University of West London (UWL), St Mary’s Road, Ealing W5 5RF, UK
3
Applied Geophysics Laboratory, School of Mineral Resources Engineering, Technical University of Crete, 73100 Chania, Greece
4
Signal Processing for Telecommunications and Economics Lab., Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(2), 96; https://doi.org/10.3390/geosciences9020096
Received: 20 December 2018 / Revised: 2 February 2019 / Accepted: 12 February 2019 / Published: 19 February 2019
(This article belongs to the Special Issue Advances in Ground Penetrating Radar Research)
Effective quality assurance and quality control inspections of new roads as well as assessment of remaining service-life of existing assets is taking priority nowadays. Within this context, use of ground penetrating radar (GPR) is well-established in the field, although standards for a correct management of datasets collected on roads are still missing. This paper reports a signal processing method for data acquired on flexible pavements using GPR. To demonstrate the viability of the method, a dataset collected on a real-life flexible pavement was used for processing purposes. An overview of the use of non-destructive testing (NDT) methods in the field, including GPR, is first given. A multi-stage method is then presented including: (i) raw signal correction; (ii) removal of lower frequency harmonics; (iii) removal of antenna ringing; (iv) signal gain; and (v) band-pass filtering. Use of special processing steps such as vertical resolution enhancement, migration and time-to-depth conversion are finally discussed. Key considerations about the effects of each step are given by way of comparison between processed and unprocessed radargrams. Results have proven the viability of the proposed method and provided recommendations on use of specific processing stages depending on survey requirements and quality of the raw dataset. View Full-Text
Keywords: ground penetrating radar (GPR); signal processing multi-stage method; flexible pavements; road surveys ground penetrating radar (GPR); signal processing multi-stage method; flexible pavements; road surveys
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MDPI and ACS Style

Bianchini Ciampoli, L.; Tosti, F.; Economou, N.; Benedetto, F. Signal Processing of GPR Data for Road Surveys. Geosciences 2019, 9, 96. https://doi.org/10.3390/geosciences9020096

AMA Style

Bianchini Ciampoli L, Tosti F, Economou N, Benedetto F. Signal Processing of GPR Data for Road Surveys. Geosciences. 2019; 9(2):96. https://doi.org/10.3390/geosciences9020096

Chicago/Turabian Style

Bianchini Ciampoli, Luca, Fabio Tosti, Nikos Economou, and Francesco Benedetto. 2019. "Signal Processing of GPR Data for Road Surveys" Geosciences 9, no. 2: 96. https://doi.org/10.3390/geosciences9020096

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