Complex use of satellite radiometric,surface radar,and cloud numerical modeling data for controlling the modification works aiming to prevent precipitation in Peterhof

Results are presented of complex study of the clouds during the modification works aiming to prevent precipitation. To estimate the modification effect, a new technique is presented based upon comparison of the IR-radiometer measurements data, from the Meteosat satellite, on radiation temperature of the clouds after modification and those in natural development cycle. It is shown that for the case under study, radiation temperature increase is observed in the pixel corresponding to the city in which precipitation should be prevented.     

Multiplicity and apsidal motion in the eclipsing binary EQ Boo

We present the first estimates of the relative and absolute parameters of the eclipsing binary EQ Boo based on a light-curve analysis (P = 5.43^d, V = 8.8 ^m ). This star is simultaneously Component A of the visual binary ADS 9422 (spectral types F7V + G0V; separation of the components 1.3″; magnitude difference 0.7 ^m ). The derived disagreement between the components’ physical parameters and the assumption that they have the same age can be removed if there is a fourth, late-type star in the system. This is also able to explain the observed anomaly in the behavior of the O-C residuals at times of minima.     

Geochemical peculiarities of ore-forming fluids and conditions of formation of gold mineralization of the Butarnoe deposit (Northeast of Russia)

Doklady Earth Sciences -     

Estimation of lunar and solar tides in the Earth’s thermosphere from density measurements by the CACTUS microaccelerometer

The densities measured by the CACTUS microaccelerometer at altitudes from 270 to 600 km are used to analyze the effect of tidal perturbations in the Earth’s thermosphere caused by the gravitational attraction of the Moon and the Sun. These tidal perturbations are considered a priori small and are not taken into account in modern atmospheric density models. The residuals between the densities measured by the CACTUS microaccelerometer and calculated by models are analyzed, and the density variations correlating with variations of the zenith angles from the Moon to the center of the Earth to the satellite and from the Sun to the center of the Earth to the satellite are found at altitudes from 270 to 600 km. The amplitude of the perturbations revealed in the study grows with height. The phase of the tidal perturbations also varies with height. The amplitude of the density variations is about 30% at 270–320 km and increases to 80% at 520–570 km. The results agree with a priori theoretical estimates obtained for tidal motion of gaseous matter with a variable density.     

Fast Apsidal Rotation and Physical Parameters of V1103 Cas

Astronomy Reports - We present the first high accuracy UBV RI(RI)c light curves of poor investigated eclipsing star V1103 Cas = GSC 3682 736 ( $$P{{ = 6.18}^{d}}$$ , $$V = {{11.16}^{m}}$$ , $$e =...