Aerospace Instrument-Making Annotation << Back METHODS OF INITIAL DATA UNCERTAINTY DECREASE OF OPTICAL-GEOMETRICAL MODELING OF SPACE OBJECTS V.R. Akhmetianov, I.O. Lutov, M.I. Oleinikov In the article the problems of usage of optical-geometrical modeling for defi nition of the dimensional and refl ective characteristics of spacecraft are considered, which one after ending term of fi ssile existence pass in the category of space debris and require continuous supervising and check, including, ground-level opticalelectronic means. With this purpose it is offered to use the compact alphabet of the geometrical description of the contour pattern of a construction of spacecraft by the way collections of primitives mapped on the source image with allowance for of properties of a central projection of object of supervising on a picture plain. For decrease of a projection arguments uncertainty the methods based on usage of marker points are stated. The defi nition of diffuse-refl ection factors allows receiving estimations of a vector of the optical performances of structural elements of spacecraft. The method of formal representation of the indicated vectors for decrease of uncertainty is offered at a partition of surfaces on equivalence classes on a diffuse-refl ection factor. The approach, offered in the article, is illustrated on an example of the image of spacecraft «Hubble Space telescope», received in 2009 during space experiment «Atlantis» STS-125. Key words: spacecraft, space debris, optical-electronic means, geometrical characteristics, optical characteristics of materials and covers. Contacts: - Pp. 19-27.