The resulting phenomena in visible light are called Transient Luminous Events (TLE) and take a great diversity of forms sprites, blue jets, red giants, halos, elves, varying in color, shape and duration, and relations between them.
[5] The Atmosphere-Space Interactions Monitor (ASIM) of the International Space Station was to operate concurrently with TARANIS and was to provide additional observations.
The scientific payload was made of seven instruments:[6] The studied phenomena last not more than a few milliseconds (except blue jets), therefore a specific recording method is implemented.
Scientific instruments operate continuously and data is stored in a memory that is regularly purged of its oldest elements.
The exact cause could be first ignition of the engine of the Avum fourth stage, a deviation of trajectory was identified, entailing the loss of the mission.