The ground-based 0.36m mirror coronagraph with super-polished off-axis parabolic primary mirror for solar
applications has developed and build now. Optical system design, technology of scattering level measurement of
primary mirror surface and the method of adjustment are described. Also presents the constructions of heat-stop, Lyot-stop
assemblies and truss. The kit of spectral equipment and detectors for actual solar astrophysics tasks is discussed.
Based on the results of repeated measurements of under dome airstreams parameters of the AZT-33 telescope, some conclusions have been drawn, allowing improvement in quality of astronomic images in the telescope. After fulfillment of a part of recommended works, changes of under dome climate were compared with the measurements of 2005. New measurements verify the results obtained in 2005. Mixing of warm and cold air is observed inside the telescope after dome opening as well as one-order-of-magnitude increase of turbulence intensity in front of the input telescope mirror after dome opening. A changed pattern of under dome airstreams has been constructed. Further measures on qualitative thermal insulation of the under dome room are recommended. Astronomic observations are to be carried out only after
ending of transient processes concerned with dome opening.
This work presents the results of measurements of intradome astroclimate parameters of the AZT-14 telescope of Sayan
solar observatory of the ISTP SB. The picture of airflows concerned with the warm air run-out though leaky connections
and air mixing inside the telescope after dome opening is obtained. It is shown that the value of the structure
characteristic of the refractive index C<sub>n</sub><sup>2</sup> in closed and open dome can 1.5-2 times differ. Essential turbulence
intensification in front of the entrance telescope mirror when dome opening is ascertained. Strongly unstable
stratification near the receiver is observable, caused by the stair opening in the concrete floor of the dome, which can
result in intensification of the refractive index fluctuations in the presence of even small heat sources. Conclusions are
drawn from the measurements, which can be related to all telescope of the considered class. It is necessary to prevent
foreign heat sources in the dome and block warmer airflows from the stair opening; astronomical observations are to be
carried out after completion of transient processes related to the dome opening.
The AZT-33 astronomic telescope has been testes at Sayan solar observatory (Institute of Solar-Terrestrial Physics SB
RAS) with respect to the characteristics of intradome airflows, affecting the image quality. From the results of testing
the airflows in the telescope, some conclusions have been drawn, which allow the quality of astronomic images in
telescopes similar to AZT-33 to be improved. For example, there should be no foreign heat sources inside the telescope
dome during measurements. This means that measures should be undertaken to remove open slits in the concrete floor
and to block out warm airflows from the stair well. In addition, measurements should be carried out only after the
transient processes associated with the opening of the dome slit are fully accomplished.
This paper presents the results derived by exploring the possibilities of creating an interplanetary stereoscopic observatory to investigate the 3D structure solar features from granules and spicules to coronal structure. A preliminary stage was made of the passive motion of two spacecrafts in the vicinity of Lagrangian libration points L<SUB>4</SUB> and L<SUB>5</SUB>. The version of ballistic scheme of setting-up of the system with a minimal deployment time is considered. For preliminary development of stereoscopic SC the main parameters of scientific payload have been taken: mass - 600 kg, power's - 1 kw, summary data - 5 Gbits per day. The chief results of this work are: (1) the stereoscopic observatories can be realized with a complete set of achievable objectives, (2) launching of SC with the mass 2000 kg into both libration points is possible by using Soviet rocket-vehicle `Proton' in a time 1.17 year, (3) transmission of information from stereoscopic observatory amount 5 Gbit per day is possible by the ground-based antenna 70 m in diameter and using, aboard the SC's, a transmitting-receiving phase-array antenna of size 5 X 5 m.