arXiv subjects

I. A. Maslov

Publications and source records attributed to I. A. Maslov.

6 recordsLinked to original sources

arXiv2015

Comparison of the infrared magnitudes of the eclipsing variable star epsilon Aur during the two main luminance lows using observations from 1980 to 2015

The data of photometric measurements of the long-period eclipsing variable epsilon Aur in the two main minima 1982 and 2010 in the spectral range of 1--5 microns are presented. Noted is the similarity of light curves in eclipse, its asymmetry, and availability of the short interval increased brightness. We are detecting the phase changing of the indicator color J-M and the effect of short-time changing of the color to be more blue at the moments during the beginning and end of the eclipse.

astro-ph.SR↗

arXiv2005

Atmospheric Aerosol Limb Scanning Based on the Lunar Eclipses Photometry

The work is devoted to the analysis of the surface photometric observations of two total lunar eclipses in 2004. The lunar surface relative brightness distribution inside the umbra was used to retrieve the vertical distribution of aerosol extinction of the solar radiation expanding by a tangent path and its dependence on the location at the limb of the Earth. The upper altitude of troposphere aerosol layer was estimated for different latitude zones. The correlation between additional aerosol extinction in the upper troposphere and cyclones was investigated.

astro-ph↗

arXiv2003

Effects Of Aerosol And Multiple Scattering On The Polarization Of The Twilight Sky

The paper contains the review of a number of wide-angle polarization CCD-measurements of the twilight sky in V and R color bands with effective wavelengths equal to 550 and 700 nm. The basic factors effecting (usually decreasing) on the polarization of the twilight sky are the atmospheric aerosol scattering and multiple scattering. The method of multiple scattering separation is being considered. The results are compared with the data of numerical simulation of radiation transfer in the atmosphere for different aerosol models. The whole twilight period is divided on the different stages with different mechanisms forming the twilight sky polarization properties.

physics.geo-ph↗

arXiv2003

Polarization of the Twilight Sky: Measurements, Empirical Model, Radiative Transfer Simulation and Application to Aerosol Profile Retrieval

Polarimetric observations of the twilight sky are effective for the investigations of scattering properties of the atmosphere at different altitudes. Modern computer technique allows to reduce the influence of multiple scattering on the twilight sky background which is necessary for the aerosol investigations. In this paper the results of polarimetric observations of the twilight sky are discussed and compared with the numerical analysis by MCC++ model for different models of atmospheric aerosol. As it was found, the model of urban troposheric and background stratospheric aerosol shows the best agreement with observed polarimetric properties of the twilight sky.

physics.ao-ph↗

arXiv2003

Near-Earth Observations by Spread Telescopes

We suggest the all-sky survey at the International Space Station by four little wide-angle telescopes with polarization filters and CCD-arrays spread by several meters one from another. The video information processing will be carried out by real-time multiprocessor system on the board of the station. This experiment would allow to observe the sunlit space debris and meteoroids of centimetre size with their distances and velocities estimations at the distances up to 20 km from station and to investigate the interplanetary and interstellar medium by the making of polarization sky maps and detecting the weak-contrast features on it.

astro-ph↗

arXiv2001

Multi-Color Polarimetry of the Twilight Sky. The Role of Multiple Scattering as the Function of Wavelength

This work is devoted to the study of solar light that experiences single and multiple scattering in the atmosphere at the twilight time. The work is based on polarimetric observations of the twilight sky that were conducted in 1997 and 2000 for different color bands. Basing on the results of observations, the contribution of single-scattered light depending on the wavelength for the light stage of twilight is obtained. The correlation of color and polarization properties of the twilight sky is investigated with an account of multiple scattering

physics.ao-ph↗