Aerospace Instrument-Making Annotation << Back On possibility of combining of Differential Optical Absorption Spectroscopy method with three wavelengths method H.H. Asadov, Sh.T. Suleymanov The positive and negative features of DOAS method and three wavelengths method have been stressed out in the article. It is shown, that combining of two these methods allows developing the new device possessing such a positive features of DOAS method as removal of low frequency background signal in wide band of wavelengths and also of three wavelengths method – possibility of separate compensation of background signal components.