The usage of stratospheric balloons. One old invention back on fashion.

When scientists wish to study the atmosphere above us, many different means of transportation are used:
Aircraft - Maximum altitude, regular aircraft: 10 km. High altitude aircraft: 25 km.
Sounding rockets - From 2-3 km to 1000 km.
Satellites - Lowest altitude possible (due to air density): about 200 km.
One of the most interesting areas of study in recent years has been the ozone layer, at an altitude of about 25 - 35 km. A problem with studies of the ozon layer is the fact that it cannot be reached by means of planes or satellites. Using sounding rockets will transport the experiment to…