The direction of research activity is connected with investigation of the rotational and vibrational spectra of polyatomic molecules in the gaseous phase. It has long been of basic importance for determining precise molecular geometry in different vibrational states, for obtaining information on molecular force fields, rotational – vibrational interaction parameters, barriers to internal rotation, dipole moments, calculation of thermodynamic functions from structural and vibrational data and, in general, for obtaining information on the relations between the structure and physical properties of molecules, such as: H₂S, C₂H₄ и C₂H₂D₂-cis.

Spectroscopy is the only method which can provide information on the chemical composition of remote objects such as interstellar clouds inside and outside our Galaxy. Recent discoveries of complex organic molecules in interstellar space using microwave spectroscopic methods are among the important results of modern astrophysics.

The availability of this kind information is a key to the successful solution of numerous fundamental and applied problems in many areas of physics and chemistry, such as: physics and chemistry of the interstellar environment and planetary atmospheres, atmospheric optics, gas analysis and environmental monitoring, laser technology, various problems chemical physics, kinetics of chemical reactions and etc.