Diagnostics of Atmospheric Disturbances Using the Method of Projection Operators

Theoretical foundations of the diagnostics of wave disturbances of the atmosphere, including slowly varying ones, are considered. Special attention is given to the latter type of variations, such as the entropic mode. The mathematical apparatus of the theory is based on the projection operators for the problem of boundary regime propagation. This procedure makes it possible to perform diagnostics using measurements in the neighborhood of a single point. A one-dimensional problem of acoustic waves in an exponential atmosphere is analyzed in detail.