Application of the time reversal of electromagnetic fields to locate lightning discharges

Mora, Nicolas (EPFL, Lausanne, Switzerland) ; Rachidi, Farhad (EPFL, Lausanne, Switzerland) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

In this paper, we propose a new method for locating lightning discharges. The proposed method is based on the time reversal technique introduced for acoustics in the early 1990s. By analogy to the derivations in acoustics, equations for the focusing of electromagnetic fields back to the source by time reversal are derived. We show that the wavefronts generated by back-propagating the time-reversed fields will add up in phase at the lightning strike location. Based on this observation, we present an algorithm to locate lightning discharges which requires at least three field sensors. The algorithm is illustrated and shown to be very efficient using numerically-generated fields for different cases and considering different numbers of sensors.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Date:
2012-11
Pagination:
8 p.
Published in:
Atmospheric Research
Numeration (vol. no.):
2012, vol. 117, pp. 78-85
DOI:
ISSN:
0169-8095
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2020-07-07, last modified 2020-07-09

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