Failure reason: A software error led to integer overflow, causing the rocket to veer off its flight path 37 seconds after launch. This caused the vehicle to disintegrate under high aerodynamic forces, eventually self-destructing due to its flight termination system.

A constellation of four ESA spacecraft. These were intended to fly in a tetrahedral formation, and was inteded to conduct research into the Earth's magnetosphere.

Mission type: Earth Science · Orbit: High Earth Orbit

Rocket: Ariane 5 G · Provider: Arianespace