50 citations · 172 across the 17 of their papers we have counts for
17 papers
The antenna phase center motion effect in high-accuracy spacecraft tracking experiments
D. A. Litvinov, N. V. Nunes, A. I. Filetkin +5
We present an improved model for the antenna phase center motion effect for high-gain mechanically steerable ground-based and spacecraft-mounted antennas that takes into account no…
The gravitational redshift monitored with RadioAstron from near Earth up to 350,000 km
N. V. Nunes, N. Bartel, M. F. Bietenholz +6
We report on our efforts to test the Einstein Equivalence Principle by measuring the gravitational redshift with the VLBI spacecraft RadioAstron, in an eccentric orbit around Earth…
A new method of testing the gravitational redshift effect with radio interferometers
S. V. Pilipenko, D. A. Litvinov, A. I. Filetkin +1
We propose a new method to measure gravitational redshift effect using simultaneous interferometric observations of a distant radio source to synchronize clocks. The first order by…
RadioAstron orbit determination and evaluation of its results using correlation of space-VLBI observations
M. V. Zakhvatkin, A. S. Andrianov, V. Yu. Avdeev +14
A crucial part of a space mission for very-long baseline interferometery (VLBI), which is the technique capable of providing the highest resolution images in astronomy, is orbit de…
The antenna phase center motion effect in space-based experiments for fundamental physics and astronomy
A. I. Filetkin, D. A. Litvinov, V. N. Rudenko +1
We consider the effect of phase center motion of mechanically steerable high-gain parabolic antennas for ground-based and spacecraft-mounted antennas. For spacecrafts on highly ell…
Probing the gravitational redshift with an Earth-orbiting satellite
D. A. Litvinov, V. N. Rudenko, A. V. Alakoz +45
We present an approach to testing the gravitational redshift effect using the RadioAstron satellite. The experiment is based on a modification of the Gravity Probe A scheme of nonr…