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For radar and communication systems, the search for code sequences with good correlation properties remains one of important tasks. This work shows the results of the study of aperiodic autocorrelation functions of new code sequences based on persymmetric quasi-orthogonal circulants. The numerical values of the quality parameters such as: the maximum sidelobe level, integrated sidelobe level ratio, and merit factor are given. Applying new code sequences makes it possible to reduce the maximum sidelobe level of the aperiodic autocorrelation function, as well as to reduce the summary energy of the sidelobes, which makes it possible to conclude that their application is promising. The obtained results are aimed at stimulating scientific interest in new bases derived from quasi-orthogonal matrices, as a basis for the revision of signal coding algorithms.

The paper highlights the features of the implementation of on-board systems for monitoring the earth’s surface, based on small aircraft. The problems of fusion of location information from on-board monitoring systems of various types of functioning are considered. The motivation of integrating optical and radar images of the earth’s surface is shown. The result of the work is the synthesis of optical and radar images of the earth’s surface into a single information field.

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