In-flight measurements of energetic radiation from lightning and thunderclouds

摘要: In the certification procedure aircraft builders carry out so-called icing tests flights, where zero degree Celsius altitude is deliberately sought and crossed in or under thunderstorms. Airbus also used these flights to test ILDAS, a system aimed determine lightning severity attachment points during flight from high speed data on electric magnetic field at surface. We this unique opportunity enhance ILDAS systems with two x-ray detectors coupled recorders an attempt x-rays produced by in-situ, synchronous determination of current distribution aircraft. Such are interest study physics. addition, may provide clues dose for personnel equipment flights. The campaign ran April 2014; six we collected 61 strikes communication briefly describe present selected results three strikes, initiated one intercepted. Most have been observed initiating negative leader steps, as bursts immediately preceding recoil process. Those processes include return stroke. last four micro-second attain energies up 10 MeV. Intensity spectral association discussed. continuously records low resolution time amplitude.