  An accurate forecast of flare and CME initiation requires precise
measurements of the magnetic energy build up and release in the active regions
of the solar atmosphere. We designed a new space weather mission that performs
such measurements using new optical instruments based on the Hanle and Zeeman
effects. The mission consists of two satellites, one orbiting the L1 Lagrangian
point (Spacecraft Earth, SCE) and the second in heliocentric orbit at 1AU
trailing the Earth by 80$^\circ$ (Spacecraft 80, SC80). Optical instruments
measure the vector magnetic field in multiple layers of the solar atmosphere.
The orbits of the spacecraft allow for a continuous imaging of nearly 73\% of
the total solar surface. In-situ plasma instruments detect solar wind
conditions at 1AU and ahead of our planet. Earth directed CMEs can be tracked
using the stereoscopic view of the spacecraft and the strategic placement of
the SC80 satellite. Forecasting of geoeffective space weather events is
possible thanks to an accurate surveillance of the magnetic energy build up in
the Sun, an optical tracking through the interplanetary space, and in-situ
measurements of the near-Earth environment.
