> When the time of group arrival is measured with 100 ns absolute accuracy by several widely spaced receivers, it is possible to locate lightning to within < 5 km

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL09...

Note that the inaccuracy comes from determining where the lightning strike starting point was from the waveform shape.

The raw position accuracy at 100 ns is better than 10 m.