AE005-04
ASIM - Fermi - AGILE simultaneous observation of Terrestrial Gamma-ray Flashes

Wednesday, 9 December 2020: 16:10
Virtual
Martino Marisaldi1, Andrew Mezentsev1, David Sarria Sr1, Anders Lindanger1, Nikolai Ostgaard2, Torsten Neubert3, Reglero Victor4, Pavlo Kochkin1, Nikolai G. Lehtinen1, Carolina Maiorana1, Chris Alexander Alexander Skeie1, Ingrid Bjørge-Engeland1, Kjetil Ullaland1, Georgi Genov1, Freddy Christiansen3, Hugh J Christian Jr5, Samer Alnussirat6, Michael S Briggs7, Alessandro Ursi8 and Marco Tavani9, (1)University of Bergen, Birkeland Centre for Space Science, Bergen, Norway, (2)Birkeland Centre for Space Sciece, Bergen, Norway, (3)Technical University of Denmark, DTU Space, Kgs. Lyngby, Denmark, (4)University of Valencia, Image Processing Laboratory, Burjassot, Spain, (5)University of Alabama in Huntsville, Huntsville, AL, United States, (6)Louisiana State University, Physics and Astronomy, Baton Rouge, LA, United States, (7)CSPAR, The University of Alabama in Huntsville, Huntsville, AL, United States, (8)IAPS-INAF, Rome, Italy, (9)INAF IAPS, Roma, Italy
Abstract:
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 main 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 the observations and the constraints to emission geometry based on coupled observations and Monte Carlo simulations.

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