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Title

Spectroscopic Diagnostic of Halos and Elves Detected From Space-Based Photometers

AuthorsPérez-Invernón, Francisco J.; Luque, Alejandro ; Gordillo Vázquez, Francisco J. ; Sato, M.; Ushio, T.; Adachi, T.; Chen, A. B.
KeywordsASIM
Atmospheric electricity
Lightning
Spectroscopic diagnostic
TARANIS
TLEs
Issue Date2018
PublisherAmerican Geophysical Union
CitationJournal of Geophysical Research - Part D - Atmospheres 123(22): 12917-12941 (2018)
AbstractIn this work, we develop two spectroscopic diagnostic methods to derive the peak reduced electric field in transient luminous events (TLEs) from their optical signals. These methods could be used to analyze the optical signature of TLEs reported by spacecraft such as Atmosphere-Space Interactions Monitor (European Space Agency) and the future Tool for the Analysis of RAdiations from lightNIngs and Sprites (Centre National d'Études Spatiales). As a first validation of these methods, we apply them to the predicted (synthetic) optical signatures of halos and elves, two types of TLEs, obtained from electrodynamical models. This procedure allows us to compare the inferred value of the peak reduced electric field with the value computed by halo and elve models. Afterward, we apply both methods to the analysis of optical signatures of elves and halos reported by Global LIghtning and sprite MeasurementS (Japan Aerospace Exploration Agency) and Imager of Sprites and Upper Atmospheric Lightning (National Space Organization) spacecraft, respectively. We conclude that the best emission ratios to estimate the maximum reduced electric field in halos and elves are the ratio of the second positive system of N to first negative system (FNS) of N (Formula presented.), the first positive system of N to FNS of N (Formula presented.) and the Lyman-Birge-Hopfield band of N to FNS of N (Formula presented.). In the case of reduced electric fields below 150 Td, we found that the ratio of the second positive system of N to first positive system of N can also be used to reasonably estimate the value of the field. Finally, we show that the reported optical signals from elves can be treated following an inversion method in order to estimate some of the characteristics of the parent lightning. ©2018. American Geophysical Union. All Rights Reserved.
Publisher version (URL)http://dx.doi.org/10.1029/2018JD029053
URIhttp://hdl.handle.net/10261/216319
Identifiersdoi: 10.1029/2018JD029053
issn: 2169-8996
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