5 papers
Evolution of the radio source position uncertainties in radio astrometric catalogs over the past three decades
Zinovy Malkin
In this paper, progress in improving the coordinates uncertainty of extragalactic radio sources derived from astrometric and geodetic VLBI observations is investigated. For this pu…
Should We Expect Further Acceleration of the Earth's Rotation in the Coming Years?
Zinovy Malkin
Recently, it has been suggested in the literature that the difference between universal and coordinated time UT1-UTC could reach a large positive value in the coming years (Agnew 2…
Filling the gap in the IERS C01 polar motion series in 1858.9-1860.9
Zinovy Malkin, Nina Golyandina, Roman Olenev
The C01 Earth orientation parameters (EOP) series provided by the International Earth Rotation and Reference Systems Service (IERS) is the longest reliable record of the Earth's ro…
Improving source positions in the OCARS catalog: A first approach
Zinovy Malkin
OCARS (Optical Characteristics of Astrometric Radio Sources) is a compiled catalog of various additional data associated with astrometric radio sources whose coordinates have been…
On the Use of Vector Spherical Harmonics
Zinovy Malkin
In many astronomical works, the structure of vector fields is analyzed, such as the differences in the celestial object coordinates in catalogs or the celestial object velocities,…