A unique feature of this telescope is that it will be capable of conducting realtime, high-efficiency, high-precision spectropolarimetry of multiple magneto-sensitive lines over a two-dimensional field of view, i.e. giving realtime 3D Stokes measurements of multiple lines. Thus acting as a very efficient 3D spectropolarimeter, FASOT will be capable of very high temporal resolution, permitting accurate mapping of the magnetic field, the line-of-sight velocity and the thermodynamic parameters in multiple scale heights of the solar atmosphere. It will be able to target rapid and transient magnetically-dynamic phenomena, thus verifying the theoretical models. It aims also at accurate short-term forecasting of space weather.