- Study of temporal
variations in the energy spectra of hard EM radition in the broad-band
energy range from 15 keV to 2000 keV.
- Fast timing of hard X-ray
radiation in flares.
- Measuremnt of the linear
polarisation of hard X-rays in flares.
- Hard X-ray imaging of Sun.
- Study of energy spectra,
charge and mass composition of ions acclerated in flares.