The metrological support of many measurement tasks requires measuring spatial position of some objects in respect to
rigid base. The microwave radio-telescope development requires high-precision control of the position of the counterreflector.
The construction elements weight and thermal deformation leads to changes of position and linear shift of each
planar section in respect to ideal parabolic shape. In this case it is necessary to implement control system for measuring
these deformations of the reflector. For determination of the actual shape of the reflector control objects (light-emitting
diodes, LED) placed on the reflector, and their coordinates in respect to motionless construction element (base ring
placed on the top main mirror) are measured by triangulation method using CCD camera, which determines vision angles
of LEDs. Analysis of relations of primary errors of measurements and errors of determinations of actual coordinates of
the reflectors confirm feasibility of the whole system of control of the shape of counter-reflector.