EM modelling of lightning effects on SKA-low array antennas

In this paper we discuss the issue of lightning in low frequency arrays for radio astronomy with the SKA telescope in mind. The non-linear nature of the lightning makes it impossible with present computational codes to derive accurate pictures of lightning current effects on large, galvanically-connected structures. We consider a linearised approach to model idealised lightning with a focus on indirect strikes. The intention is to build up an understanding of minimising lightning damage and associated RFI in the arrays. Finally, we discuss the advantages of scale prototype measurements and time gating as expedient techniques to characterize these effects in controlled environments.