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dc.contributor.authorSkeie, Chris Alexander Kallevik
dc.contributor.authorØstgaard, Nikolai
dc.contributor.authorMezentsev, Andrey
dc.contributor.authorBjørge-Engeland, Ingrid
dc.contributor.authorMarisaldi, Martino
dc.contributor.authorLehtinen, Nikolai Grigorievich
dc.contributor.authorReglero, V.
dc.contributor.authorNeubert, T.
dc.description.abstractWe present 221 Terrestrial Gamma-ray Flashes (TGFs) and associated optical pulses observed by the Atmosphere-Space Interactions Monitor (ASIM) on board the International Space Station. The events were detected between the end of March 2019 and November 2020 and consist of X- and gamma-ray energy detections, as well as photometer data (180–230, 337, and 777 nm) and optical camera data (337 and 777 nm). Using the available ASIM data and applying a consistency check based on TGF characteristics and lightning detections from lightning radio atmospherics close in time, we determine the most likely position of the TGFs in relation to the photometer field of view (FoV), and the association to the observed optical pulses. Out of the 221 events we find 72 events where the TGF and optical data are determined to be associated and inside the photometer FoV. Using the measured TGF durations and the time between the onsets of the TGFs and optical pulses we find: (a) That the TGF onsets are always before or at the same time as the optical pulse onsets (taking into account cloud scattering). (b) A tendency for longer duration TGFs to have longer delays between onsets. (c) Two groups of events: (a) where there is a possible overlap between the TGFs and the optical emissions, as the TGFs last longer than the delay between onsets and (b) where the TGFs and optical emissions do not overlap, as there are long delays between the onsets, which cannot be explained by cloud scattering.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleThe Temporal Relationship Between Terrestrial Gamma-Ray Flashes and Associated Optical Pulses From Lightningen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.rights.holderCopyright 2022. The Authorsen_US
dc.source.journalJournal of Geophysical Research (JGR): Atmospheresen_US
dc.identifier.citationJournal of Geophysical Research: Atmospheres. 2022, 127 (17), e2022JD037128.en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal