A telescope is never perfect because of mechanical, gravity, temperature and wind induced deformations of its structure, because of production imperfections and because of accidental small misalignments of the constrictive elements. The resulting degrading effect on the beam pattern is negligible if the corresponding deformation of the reflector and the misalignment of the constructive elements (main reflector, sub reflector, receiver) are small compared to the wavelength of observation, i.e. smaller. The degradation becomes noticeable and disturbing if the corresponding deformation is larger. In our work we examined the different deformations influence on field distribution in antenna’s aperture for ROT-54/2.6 Radio Optical Telescope. Even taking into considerations that the gravity and wind impacts are minimized 36 in ROT-54/2.6 because of constructive feature, we obtained simple formulas demonstrating each type of deformation influence on phase distortion as well as combined impact of deformations on overall antenna efficiency.

Joint International Conference on Astrophysics for Young Scientists (JICA) (1; 2017; Byurakan, Armenia). The First Joint International Conference on Astrophysics for Young Scientists (JICA) [Электронный ресурс]: Oktober 3-7, 2017, Byurakan, Armenia: [book of proceedings]. — Электрон. текстовые дан. (1 файл : 3,69 Мб). — Saint-Petersburg: Peter the Great St. Petersburg Polytechnic University, 2017. — Загл. с титул. экрана. — Электронная копия печатной публикации 2017 г. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/i17-449.pdf>.