Blar i Bergen Open Research Archive på forfatter "Skeie, Chris Alexander Kallevik"
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Aircraft and spacecraft observations of high-energy radiation associated with lightning leaders
Skeie, Chris Alexander Kallevik (Doctoral thesis, 2022-10-03)Denne avhandlingen undersøker røntgen og gammastråling assosiert med lyn ledere, observert av instrumenter på fly og fra verdensrommet. Avhandlingen består av tre forskningsartikler, publisert i Journal of Geophysical ... -
Aircraft interaction with electric field of thundercloud and observations of hard radiation
Skeie, Chris Alexander Kallevik (Master thesis, 2018-06-16)The purpose of this thesis is to study the relationship between the different phases of lightning flashes and the production of high-energy emissions, as well as highenergy emissions observed from thunderclouds. The data ... -
Constraints on Recoil Leader Properties Estimated from X-ray Emissions in Aircraft-Triggered Discharges
Skeie, Chris Alexander Kallevik; Østgaard, Nikolai; Lehtinen, Nikolai; Sarria, David; Kochkin, Pavlo; de Boer, Boer; Bardet, M.; Allasia, C.; Flourens, F. (Journal article; Peer reviewed, 2020)During Airbus aircraft campaigns flying into thunderstorms in 2014–2016, X-rays were observed during two stages of aircraft-triggered lightning: nanosecond pulses of X-rays associated with negative leader steps and bursts ... -
In‐Flight Observation of Positron Annihilation by ILDAS
Kochkin, Pavlo; Sarria, David; Skeie, Chris Alexander Kallevik; Van Deursen, Alexander P.J.; de Boer, A; Bardet, Michiel; Allasia, Cedric; Flourens, Franck; Østgaard, Nikolai (Peer reviewed; Journal article, 2018-08)We report a 511‐keV photon flux enhancement that was observed inside a thundercloud and is a result of positron annihilation. The observation was made with the In‐flight Lightning Damage Assessment System (ILDAS) on board ... -
Observation of Terrestrial Gamma-Ray Flashes at Mid Latitude
Maiorana, Carolina; Marisaldi, M.; Füllekrug, Martin; Soula, Serge; Lapierre, J.; Mezentsev, Andrey; Skeie, Chris Alexander Kallevik; Heumesser, M.; Chanrion, Olivier; Østgaard, N.; Neubert, Torsten; Reglero, Victor (Journal article; Peer reviewed, 2021)We present a sample of Terrestrial Gamma-ray Flashes (TGFs) observed at mid latitudes by the Atmosphere Space Interaction Monitor (ASIM). The events were detected between June 2018 and August 2020 in the latitude bands ... -
Production of Terrestrial Gamma-Ray Flashes During the Early Stages of Lightning Flashes
Lindanger, Anders; Skeie, Chris Alexander Kallevik; Marisaldi, Martino; Bjørge-Engeland, Ingrid; Østgaard, Nikolai; Mezentsev, Andrey; Sarria, David Alexandre Stephan; Lehtinen, Nikolai Grigorievich; Reglero, Victor; Chanrion, Olivier; Neubert, Torsten (Journal article, 2022)Terrestrial Gamma-ray Flashes (TGFs) are short emissions of high energy photons associated with thunderstorms. It has been known since the discovery of TGFs that they are associated with lightning, and several case studies ... -
Spectral Analysis of Individual Terrestrial Gamma-ray Flashes Detected by ASIM
Lindanger, Anders; Marisaldi, Martino; Sarria, David Alexandre Stephan; Østgaard, Nikolai; Lehtinen, Nikolai Grigorievich; Skeie, Chris Alexander Kallevik; Mezentsev, Andrey; Kochkin, Pavlo; Ullaland, Kjetil; Yang, Shiming; Genov, Georgi; Carlson, Brant Edward; Köhn, Christoph; Navarro-Gonzalez, Javier; Connell, Paul H.; Reglero, Victor; Neubert, Torsten (Journal article; Peer reviewed, 2021)The Atmosphere-Space Interactions Monitor (ASIM) is the first instrument in space specifically designed to observe terrestrial gamma-ray flashes (TGFs). TGFs are high energy photons associated with lightning flashes and ... -
The Temporal Relationship Between Terrestrial Gamma-Ray Flashes and Associated Optical Pulses From Lightning
Skeie, Chris Alexander Kallevik; Østgaard, Nikolai; Mezentsev, Andrey; Bjørge-Engeland, Ingrid; Marisaldi, Martino; Lehtinen, Nikolai Grigorievich; Reglero, V.; Neubert, T. (Journal article; Peer reviewed, 2022)We 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 ... -
Terrestrial Gamma-Ray Flashes With Accompanying Elves Detected by ASIM
Bjørge-Engeland, Ingrid; Østgaard, Nikolai; Mezentsev, Andrey; Skeie, Chris Alexander Kallevik; Sarria, David Alexandre Stephan; Lapierre, Jeff; Lindanger, Anders; Neubert, Torsten; Marisaldi, Martino; Lehtinen, Nikolai Grigorievich; Chanrion, Olivier; Ullaland, Kjetil; Yang, Shiming; Genov, Georgi; Christiansen, Freddy; Reglero, Victor (Journal article; Peer reviewed, 2022)The Atmosphere-Space Interactions Monitor was designed to monitor Terrestrial Gamma-ray Flashes (TGFs) and Transient Luminous Events (TLEs) from space, enabling the study of how these phenomena are related. In this paper, ...