Radioastronomy station Simeiz of laboratory of radioastronomy
of Crimean astrophysical observatory

Results

1.	Estimates of the horizontal velocity of the Simeiz radio astronomy station were obtained using VLBI  observations conducted in the framework of geodynamical programs during 1994-2000. The rate of the Simeiz station at the epoch 1997.0 in the ITRF97 system is equal to 32.8+-0.9 mm/yr in the north-east direction. The complete set of 3*106 VLBI observations was analyzed, which allowed us to conclude that the Simeiz station moves with a velocity of 2.8+-0.9 mm/yr in the north-east direction with respect to the Eurasian tectonic plate considered as a rigid one.
2.	The variations of radiation of more than 30 extragalactic radio sources were studied as well as the data on their burst maxima and burst amplitudes were obtained.
3.	Observations of the Moon at 3.6 cm in Kashima (Japan) on 15, 16, 18 November 1999 and simultaneous observations at 6.2 cm in Simeiz (Ukraine) and Pushchino (Russia) on 17-19 November 2001 give no evidences of influence of the Leonid shower on the lunar radio flux.A search for impact-produced radio flashes was unsuccessful. The upper limit for flux of such flashes is 2*10-8 J Hz-1 at 6.2 cm. Further study of seismic activity of the Moon by the Lunar-A and SELENE spacecrafts is discussed.
4.	Six VLBI radar experiments to research the terrestrial planets, near-Earth asteroids and space debris objects were arranged during 1999 - 2003 with the help of the Evpatoria RT-70 planetary radar (Ukraine) and with the participation of the receiving antennas Bear Lakes RT-64 (Russia), Noto RT-32 (Italy), Torun RT-32 (Poland), Shanghai RT-25 (China), Urumqi RT-25 (China), Simeiz RT-22 (Ukraine) et al. A combination of radar and VLBI methods allowed one to obtain a new scientific instrument for measurements of short-periodic variations of planetary proper rotations and for determination of Solar system body orbits in the Radio Reference Frame. The echo-signals of 25 space debris objects at geostationary, high-elliptical and half-day orbits as well as of Venus and Mars were detected. A precise value of the Doppler shift, the main period of rotation and size estimations were obtained for some objects.