Tail Probe successfully launched on 3 August 1995 Auroral Probe successfully launched on 29 August 1996
INTERBALL is the solar-terrestrial programme aimed to study various plasma processes in the Earth magnetosphere by the system of spacecraft consisting of two pairs (satellite-subsatellite) above the
polar aurora and in the magnetospheric tail respectively. The project INTERBALL is a part of of the
Programme coordinated by the Inter-Agency Consultative Group (IACG) for Space Science consisting
of representatives of ESA, NASA, RKA and Japan Institute of Space and Aeronautics Sciences.
According to this Programme a system of ten core spacecraft of the listed above agencies will be spatially distributed (in 1995-1996) between the L1
and L2 Sun-Earth libration points to study solar-terrestrial relationship.