In large hall of TSU Scientific Library, the 4th section “Laser and optoelectronic systems: development, creation, application” of the international conference “CTRP 2017” was started. Before public, Professor of Physical and Mathematical Sciences of the Radiophysical Faculty Samokhvalov Ignaty Viktorovich speaks on “Complex investigations of cirrus clouds by the polarization lidar of NR TSU: orientation of crystals and flux of solar radiation”