EGU2020-6967
https://doi.org/10.5194/egusphere-egu2020-6967
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Assessing the relationship between the TGF durations and the onset times of the TGFs and the main optical pulses as detected by ASIM

Chris Alexander Skeie1, Nikolai Østgaard1, Ingrid Bjørge-Engeland1, Andrey Mezentsev1, Torsten Neubert2, Victor Reglero3, Martino Marisaldi1, Pavlo Kochkin1, Nikolai Lehtinen1, David Sarria1, Carolina Maiorana1, Anders Lindanger1, Kjetil Ullaland1, Georgi Genov1, Matthias Heumesser2, Freddy Christiansen2, and Olivier Chanrion2
Chris Alexander Skeie et al.
  • 1University of Bergen, Institute of Physics and Technology, The Birkeland Centre for Space Science, Bergen, Norway (casskeie@hotmail.com)
  • 2National Space Institute, Technical University of Denmark, Denmark
  • 3University of Valencia, Spain

Using the Modular X- and Gamma-ray Sensor (MXGS) and the Modular Multi-spectral Imaging Array (MMIA) of the Atmosphere-Space Interactions Monitor (ASIM), we investigate the time sequence of the Terrestrial gamma-ray flashes and the optical emissions from the associated lighting. A common observation in the ASIM data is that the TGFs are observed before or during a weak increase in the optical signals in 337 nm and 777.4 nm, and prior to- or at the onset of the main optical pulse. Using data from the MXGS and MMIA instruments for the period from April 2019, we assess the time sequence and the relationship between the observed TGF duration and the time between the onset of the TGF and the onset of the main optical pulse, with a relative timeing uncertainty of +/- 5 µs. The data prior to April 2019 is presented in Bjørge-Engeland et al.

How to cite: Skeie, C. A., Østgaard, N., Bjørge-Engeland, I., Mezentsev, A., Neubert, T., Reglero, V., Marisaldi, M., Kochkin, P., Lehtinen, N., Sarria, D., Maiorana, C., Lindanger, A., Ullaland, K., Genov, G., Heumesser, M., Christiansen, F., and Chanrion, O.: Assessing the relationship between the TGF durations and the onset times of the TGFs and the main optical pulses as detected by ASIM, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-6967, https://doi.org/10.5194/egusphere-egu2020-6967, 2020