1887
Special Issue: Ground Penetrating Radar (GPR) Numerical Modelling Research and Practice
  • ISSN: 1569-4445
  • E-ISSN: 1873-0604

Abstract

Abstract

Ground penetrating radar (GPR) is regulated regarding emission limits for ultra‐wideband in a number of jurisdictions. The definitions of these regulations employ concepts and terminology that are more suited to traditional narrow band radio transmitters. Further, the emissions limits were based on limited quantitative factual information and have resulted in stringent limitations on GPR technology advancement. Factual theoretical and experimental information on the emissions from actual GPR devices is not generally available, and the relationship with regulatory requirements is poorly understood by users. This information gap must be filled if a compelling argument for less stringent emissions levels is to be mounted in the future. Moreover, the current regulations have the potential to trigger further review of emission limits in the future which could be detrimental to the use of GPR. In this paper, we present the basic steps entailed in translating impulse time‐domain GPR instrument behaviour into ‘regulatory’ parameters. To achieve this, we also employ three‐dimensional finite‐difference time‐domain numerical modelling to simulate the transient electromagnetic field variation around dipole antennas placed on the surface of a half‐space or at a height over it to illustrate the dependency on sensor height and ground permittivity. The ultimate goal is to establish the foundation for more sensible rule making, if and when, the regulatory standards come under scrutiny for revision and further user understanding.

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2024-04-23
2024-05-22
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References

  1. Annan, A.P. (2005) Ground‐penetrating radar. In Butler, D.K. (Ed.) Near‐surface geophysics: SEG 13. Houston, TX: Society of Exploration Geophysicists, pp. 357–438.
    [Google Scholar]
  2. Annan, A.P., Diamanti, N. & Redman, J.D. (2014) GPR emissions and regulatory limits. In Proceedings of the 15th International Conference on Ground Penetrating Radar (GPR2014), Brussels, Belgium. Piscataway, NJ: IEEE, pp. 714–718.
  3. CISPR (2019) CISPR 16‐1‐1:Specification for radio disturbance and immunity measuring apparatus and methods – Part 1‐1: Radio disturbance and immunity measuring apparatus – Measuring apparatus. Geneva: International Electrotechnical Commission.
  4. DiamantiN., AnnanA.P. (2012) Characterizing the energy distribution around GPR antennas. Journal of Applied Geophysics, 99, 83–90.
    [Google Scholar]
  5. Diamanti, N., Annan, A.P. & Redman, J.D. (2013) Quantifying GPR transient waveforms in the intermediate zone. In Proceedings of the 7th International Workshop on Advanced Ground Penetrating Radar (IWAGPR2013), Nantes, France Piscataway, NJ: IEEE, pp. 1–7.
  6. ETSI (2008a) ETSI Standard EN‐302066‐1 V1.2.1: Electromagnetic compatibility and Radio spectrum matters (ERM); Ground‐ and wall‐ probing radar applications (GPR/WPR) imaging systems; Part 1: Technical characteristics and test methods. Sophia Antipolis, France: European Telecommunications Standards Institute.
  7. ETSI (2008b) ETSI Standard EN‐302066‐2 V1.2.1: Electromagnetic compatibility and radio spectrum matters (ERM); Ground‐ and wall‐ probing radar applications (GPR/WPR) imaging systems; Part 2: Harmonized EN covering essential requirements of article 3.2 of the R&TTE directive. Sophia Antipolis, France: European Telecommunications Standards Institute.
  8. ETSI (2022) ETSI Standard EN 302 066 V2.2.1: Short Range devices (SRD); Ground‐ and Wall‐probing radio determination (GPR/WPR) devices; Harmonised standard for access to radio spectrum. Sophia Antipolis, France: European Telecommunications Standards Institute. https://eur‐lex.europa.eu/legal‐content/EN/TXT/PDF/?uri=CELEX:32022D2191&from=EN (Last accessed: March 2023).
  9. FCC (2011) US Federal Communications Commission Regulations Part 15.509. Washington, DC: Federal Communications Commissionhttp://www.fcc.gov/encyclopedia/rules‐regulations‐title‐47. (Last amended: February 2023).
  10. GiannopoulosA. (2005) Modelling of ground penetrating radar using GprMax. Construction and Building Materials, 19, 755–762.
    [Google Scholar]
  11. IC (2009) Industry Canada spectrum management and telecommunications: RSS‐220, devices using ultra‐wideband technology. Canada: Radio Standards Specification, Industry. https://ised‐isde.canada.ca/site/spectrum‐management‐telecommunications/sites/default/files/attachments/2022/RSS‐220‐I1‐EN.pdf(Last amended: July 2018).
  12. Jenkins, J.M. & Watts, D.G. (1968) Spectral analysis and its applications. San Francisco, CA: Holden Day.
    [Google Scholar]
  13. Ofcom (2006) Ofcom U.K., OfW 350 requirements and guidance notes for ground probing radar. London: Ofcom. https://www.ofcom.org.uk/__data/assets/pdf_file/0025/55960/ofw350.pdf (latest version: 2019).
  14. Sheriff, R.E. (1973) Encyclopedia dictionary of exploration geophysics. Tulsa, OK: Society of Exploration Geophysicists.
    [Google Scholar]
  15. Taflove, A. (1995) Computational electrodynamics: The finite‐difference time‐domain method. Norwood, MA: Artech House.
    [Google Scholar]
  16. WarrenC., GiannopoulosA., GiannakisI. (2016) gprMax: open source software to simulate electromagnetic wave propagation for ground penetrating radar. Computer Physics Communications, 209, 163–170.
    [Google Scholar]
  17. Yee, K.S. (1966) Numerical solution of initial boundary value problems involving Maxwell's equations in isotropic media. IEEE Transactions on Antennas and Propagation, 14, 302–307.
    [Google Scholar]
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