RadioAstron satellite admits in principle a testing the gravitational redshift effect with an accuracy of better than 10−5. It would surpass the result of Gravity Probe A mission at least an order of magnitude. However, RadioAstron's communications and frequency transfer systems are not adapted for a direct application of the non relativistic Doppler and troposphere compensation scheme used in the Gravity Probe A experiment. This leads to degradation of the redshift test accuracy approximately to the level 0.01. We discuss the way to overcome this difficulty and present preliminary results based on data obtained during special observing sessions scheduled for testing the new techniques.
@article{arxiv.1506.02238,
title = {Measurement of the gravitational redshift effect with RadioAstron satellite},
author = {A. V. Birukov and V. L. Kauts and D. A. Litvinov and N. K. Porayko and V. N. Rudenko},
journal= {arXiv preprint arXiv:1506.02238},
year = {2015}
}
Comments
5 pages, 2 pictures, Proceedings to Recontres de Moriond 2015