Abstract
The possibility of compensating the atmospheric influence on precision measurement of gravitational ‘‘redshift’’ using the Earth orbiting satellites is discussed. For a communication radio signal propagating from a ground-based tracking station to a spacecraft and back, the interaction with the ionosphere and the troposphere produces a undesirable contribution to the total frequency shift which must be removed by specific data processing. In the paper we present a brief overview of atmospheric hindrances with estimation of their magnitudes. Then, the algorithms for filtering the gravitational effects against the atmospheric noise background are considered. The efficiency of such filtering is illustrated using the example of gravitational measurements with Spectr-R satellite in the RadioAstron mission.
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Funding
The research for the RadioAstron gravitational ‘‘redshift’’ experiment is supported by the Russian Science Foundation grant 17-12-01488. The RadioAstron project is led by the Astro Space Center of the Lebedev Physical Institute of the Russian Academy of Sciences and the Lavochkin Scientific and Production Association under a contract with the Russian Federal Space Agency, in collaboration with partner organizations in Russia and other countries. We have to mark especially the role of JIVE Institution in the Netherlands and the Youk University in Canada.
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Belonenko, A.V., Popov, S.M. & Rudenko, V.N. Compensation of Atmospheric Hindrances in Measuring the Gravitational Redshift Using Satellites On-board Clocks. Gravit. Cosmol. 26, 128–135 (2020). https://doi.org/10.1134/S0202289320020036
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DOI: https://doi.org/10.1134/S0202289320020036