268: Cakepan Interferometry

What this episode covers

Eric Brunning, a Professor of Atmospheric Sciences at Texas Tech University, explains the physics of lightning detection, including the use of VHF interferometry with 'cake pans' and time-of-arrival networks. He details the meteorological origins of lightning, specifically the role of ice collisions in charge separation, and debunks the feasibility of harvesting lightning energy due to its low total energy despite high power. The discussion covers advanced instrumentation like spinning electric field meters on weather balloons and the relativistic particle acceleration that produces X-rays during lightning strikes.