EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

ASIM - Fermi - AGILE simultaneous observation of Terrestrial Gamma-ray Flashes

Martino Marisaldi1, Andrey Mezentsev1, David Sarria1, Anders Lindanger1, Nikolai Østgaard1, Torsten Neubert2, Victor Reglero3, Pavlo Kochkin1, Nikolai Lehtinen1, Carolina Maiorana1, Chris Alexander Skeie1, Ingrid Bjørge-Engeland1, Kjetil Ullaland1, Georgi Genov1, Freddy Christiansen2, Hugh Christian4, Samer Al Nussirat5, Michael Briggs4, Alessandro Ursi6, and Marco Tavani6
Martino Marisaldi et al.
  • 1University of Bergen, Birkeland Centre for Space Science, Department of Physics and Technology, Bergen, Norway (
  • 2National Space Institute, Technical University of Denmark , Lyngby, Denmark
  • 3University of Valencia, Valencia, Spain
  • 4University of Alabama in Hunsville, Huntsville AL, USA
  • 5Louisiana State University, USA
  • 6INAF - IAPS, National Institute for Astrophysics, Rome, Italy

The Atmosphere Space Interaction Monitor (ASIM) mission onboard the International Space Station is the first mission specifically dedicated to the observation of Terrestrial Gamma-ray Flashes (TGF) and Transient Luminous Events (TLE). ASIM, together with the Fermi and AGILE satellites, are the only three currently operating missions capable to detect TGFs from space. Depending on orbital parameters, pairs of these missions periodically get closer than few hundreds kilometers, observing the same region on the Earth surface for up to several tens of seconds. This offers the unique chance to observe the same TGF from two different viewing angles. Such observations allow to probe the TGF production geometry and possibly put constraints on production models and electric field geometry at the source.

Here we present four TGFs detected by ASIM and simultaneously detected by Fermi (three events) or AGILE (one event) in the period June 2018 - November 2019. We present location data, light curves, and possible constraints to emission geometry based on coupled observations and Monte Carlo simulations. 

How to cite: Marisaldi, M., Mezentsev, A., Sarria, D., Lindanger, A., Østgaard, N., Neubert, T., Reglero, V., Kochkin, P., Lehtinen, N., Maiorana, C., Skeie, C. A., Bjørge-Engeland, I., Ullaland, K., Genov, G., Christiansen, F., Christian, H., Al Nussirat, S., Briggs, M., Ursi, A., and Tavani, M.: ASIM - Fermi - AGILE simultaneous observation of Terrestrial Gamma-ray Flashes, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12804,, 2020

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