The plasma-interested folks at LANL are still at it in the spirit of Peratt! This time using RF Interferometry AND polarization to 3D mapping of lightning. As the authors state, “These novel capabilities expand the horizon of what’s possible in the study of lightning physics”, i.e., plasmas. They sure do!
https://eos.org/research-spotlights/scientists-can-now-map-lightning-in-3d
https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2022JD037955