• 40 m diameter and 20 m height water tank for testing space structures in neutral buoyancy conditions • 40 x 40 m size and 35 m tall transpose stand equipped with testing and weightless systems • turntable stand for space 30 m diameter retractable radio telescopes in full turn radio telescope mode • laboratories and utilities • up-to-date instrumental test equipment • large stock and other necessary services. Along with the Institute's work, other ground tests are held at this base, with due regard for the interests of other space companies of the (former) USSR. In 1988, experimental work was carried out for two ring antenna deployable structures, each 20 m in diameter. A space experiment called "Crab" was conducted on the basis of the works done Updating of technical data, documentation and supply of prototypes to be launched. After the staged completion of the working prototypes, the following prototypes have been created to be launched: • The space radio telescope 30 m in diameter the folded transportable pack of which is shown in Figure 5 • The large-sized pneumo-rigid unfoldable structure of the reflector (Figure 6) • The "Kolkhida" long unfoldable power structure (Figure 7) • The technological site which is now being tested in the cosmonautory by S.Kricaliov and A.Artsibarsky in the "Mir-1" station • The most important stage of the new generation structure creation is the portable radio telescope for emergency communication with the spacebased objects (Figure 9) A distinctive feature of the structures under design and, primarily, of the space power installation, in contrast to conventional engineering structures, lies in their high level of precision. The geometrical precision of such systems is expected to be, in most cases, 100 times higher than that of usual ones. Solving such problems in space is a challenge. Therefore, a biased, unilateral approach to the problem solving cannot give positive results. Good design is attained by using a unified approach and by thorough
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