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Information × Registration Number 0203U006889, 0103U006901 , R & D reports Title "Radiointerferometry" popup.stage_title Head Volvach O.E., Registration Date 30-09-2003 Organization Scientific-research institute "Crimean astrophysical observatory" popup.description2 Very Long Baseline Interferometry (VLBI) is very powerful tool for for measurement with accuracy a wavelength of distances between points. The measurement of baseline and their horizontal and vertical motion presents principle interest for decision of problems global tectonics and, possible, for forecasting of earthquakes in seismic active regions. The regular VLBI observations of extragalactic sources under geodynamics programs are a part of common efforts to maintain the terrestrial and celestial reference frames and to monitor Earth orientation parameters. This activity is coordinated by the International VLBI Service for Geodesy and Astrometry (IVS). Analysis of these observations allows us to obtain the estimates of the parameters of models of geophysics, astrometry and gravitational theory. Practically all greater radio telescopes of the World form global VLBI network. 22-m radio telescope (RТ-22) of Crimean astrophysical observatory (CrAO) is one of the elements of the International GeodeticalVLBI Network. The telescope was upgraded in 1994: a Mark IIIA data acquisition terminal and a dual-frequency horn were loaned by NASA/GSFC, dual band S/X receivers were supplied by the Institute of Applied Astronomy in Sanct-Petersburg, Russia, a CH-70 hydrogen maser was supplied by the Institute of Space Research in Moscow. Interferometric fringes were obtained in the first test carried out on June 20, 1994. This upgrade enabled the station to join international observing campaigns under both astrophysical and geodynamics programs. The Position of station determined with accuracy in several mm. EVN is very interested in participation of RT-22 in VLBI observations, because it is the most eastern antenna in Europe. Its participation in EVN observations enhances about two times East-West resolution of the network. But the parameters of 2 and 8 GHz geodynamical receivers used at RT-22 are not sufficient to take place in some programmes, in particular directed to the study of faint objects. The equipment of RT-22by receivers with modern parameters will enhance its meaning for EVN and increase the sensitivity of all international networks also. This will support leadinging position of Ukraine in VLBI observations. Product Description popup.authors popup.nrat_date 2020-04-02 Close