Abstract. In the article
the problems of usage of optical-geometrical modeling for definition of the dimensional and reflective characteristics of
spacecraft are considered, which one after ending term of fissile existence
pass in the category of space debris and require continuous supervising and
check, including, ground-level optical-electronic means. The
includes the geometrical description of spacecraft as three-dimensional body
composed from functional - constructive elements (FCE), and optical
characteristics of materials and covers FCE.
For a number of spacecraft there are source specific
data representing digital photographic images, which one are presented by the
developers at a stage of assembly and test operations. The relative geometrical
performances of spacecraft can be received from analysis of the digital image.
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.
The received estimations of geometrical arguments of
spacecraft allow to realize analysis of his reflective characteristics with the
help of a mathematical model of numerically - analytical account in a visible
band, which one is based on submission of spacecraft by the way of set of
geometrical primitives of conical, spherical and flat types. As the pattern of
reflex of a surface the pattern of reflex of a Lambert – Fong is accepted. The
definition of diffuse-reflection factors allows receiving estimations of a
vector of the optical performances of structural elements of spacecraft by
means of processing outcomes of ground-level photometric supervising.
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.
Keywords: a spacecraft,
space debris, optical-electronic means, geometrical characteristics, optical
characteristics of materials and covers.
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