.I. Kulakova – Ph.D. (Eng.), Head of Department, LTD «Special Technological Center» (St. Petesburg) A.Yu. Sokharev – Leading Research Scientist, LTD «Special Technological Center» (St. Petesburg) 

This article considers the integrated navigation system for high-precision antenna phase center positioning on board of a small unmanned aerial vehicle to maintain the aperture synthesis. The focus of investigation is the main features and factors that should be considered when developing the navigation system for operation in difficult conditions. The results of a flight experiment of the navigation system developed.

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