Precise Localization of High-Voltage Breakdown Events Using $ phi$-Optical Time-Domain Reflectometry on an Optical Ground Wire. - Konstantinos Alexoudis; Luke Silvestre; Tom Huiskamp; Jasper Müller; Vincent Sleiffer; Florian Azendorf; Sander Jansen; Chigo Okonkwo; Thomas D. Bradley (ECOC, 2025)