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The Spectral Airglow Temperature Imager is an instrument, specially designedfor investigation of the wave processes in the Mesosphere-Lower Thermosphere.In order to determine the kinematic parameters of a wave, the values of aphysical quantity in different space points and their changes in the timeshould be known. As a result of the possibilities of the SATI instrument forspace scanning, different parts of the images (sectors of spectrograms)correspond to the respective mesopause areas (where the radiation isgenerated). Algorithms for sector spectra calculation are proposed. In contrastto the original algorithms where twelve sectors with angles of 30 degrees areonly determined now sectors with arbitrary orientation and angles arecalculated. An algorithm is presented for sector calculation based on pixeldivision into sub pixels. A comparative results are shown.

Algorithm for Sector Spectra Calculation from Images Registered by the Spectral Airglow Temperature Imager