Portal de Periódicos da CAPES

In‐Flight Observation of Gamma Ray Glows by ILDAS

2017; Wiley; Volume: 122; Issue: 23 Linguagem: Inglês

10.1002/2017jd027405

2169-8996

P. Kochkin, A.P.J. van Deursen, M. Marisaldi, A. Ursi, A.I. de Boer, M. Bardet, C. Allasia, J.F. Boissin, Franck Flourens, Nikolai Østgaard,

Ionosphere and magnetosphere dynamics

An Airbus A340 aircraft flew over Northern Australia with the In-Flight Lightning Damage Assessment System (ILDAS) installed onboard. A long-duration gamma ray emission was detected. The most intense emission was observed at 12 km altitude and lasted for 20 s. Its intensity was 20 times the background counts, and it was abruptly terminated by a distant lightning flash. In this work we reconstruct the aircraft path and event timeline. The glow-terminating flash triggered a discharge from the aircraft wing that was recorded by a video camera operating onboard. Another count rate increase was observed 6 min later and lasted for 30 s. The lightning activity as reported by ground networks in this region was analyzed. The measured spectra characteristics of the emission were estimated.