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With a launch expected in 2018, the TARANIS microsatellite is dedicated to the study of transient phenomena observed in\udassociation with thunderstorms. On board the spacecraft, XGRE and IDEE are two instruments dedicated to studying terrestrial\udgamma-ray flashes (TGFs) and associated terrestrial electron beams (TEBs). XGRE can detect electrons (energy range: 1 to 10 MeV) and\udX- and gamma-rays (energy range: 20 keV to 10 MeV) with a very high counting capability (about 10 million counts per\udsecond) and the ability to discriminate one type of particle from another. The IDEE instrument is focused on electrons in the\ud80 keV to 4 MeV energy range, with the ability to estimate their pitch angles.\ud \udMonte Carlo simulations of the TARANIS instruments, using a preliminary model of the spacecraft, allow sensitive area estimates\udfor both instruments. This leads to an averaged effective area of 425 cm2 for XGRE, used to detect X- and gamma-rays from TGFs,\udand the combination of XGRE and IDEE gives an average effective area of 255 cm2 which can be used to detect electrons/positrons from\udTEBs. We then compare these performances to RHESSI, AGILE and Fermi GBM, using data extracted from literature for the\udTGF case and with the help of Monte Carlo simulations of their mass models for the TEB case.\ud \udCombining this data with the help of the MC-PEPTITA Monte Carlo simulations of TGF propagation in the atmosphere, we build\uda self-consistent model of the TGF and TEB detection rates of RHESSI, AGILE and Fermi. It can then be used to estimate that\udTARANIS should detect about 200 TGFs yr−1 and 25 TEBs yr−1

TARANIS XGRE and IDEE detection capability of terrestrial gamma-ray flashes and associated electron beams