Numerical Data-Processing Simulations of Microarcsecond Classical and Relativistic Effects in Space Astrometry

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dc.creatorKopeikin, Sergei M.
dc.creatorShuygina, N. V.
dc.creatorVasilyev, M. V.
dc.creatorYagudina, E. I.
dc.creatorYagudin, L. I.
dc.date2000-07-05
dc.date.accessioned2026-07-07T06:34:58Z
dc.date.available2026-07-07T06:34:58Z
dc.descriptionThe accuracy of astrometric observations conducted via a space-borne optical interferometer orbiting the Earth is expected to approach a few microarcseconds. Data processing of such extremely high-precision measurements requires access to a rigorous relativistic model of light ray propagation developed in the framework of General Relativity. The data-processing of the space interferometric observations must rely upon the theory of general-relativistic transformations between the spacecraft, geocentric, and solar barycentric reference systems allowing unique and unambiguous interpretation of the stellar aberration and parallax effects. On the other hand, the algorithm must also include physically adequate treatment of the relativistic effect of light deflection caused by the spherically-symmetric (monopole-dependent) part of the gravitational field of the Sun and planets as well as the quadrupole- and spin-dependent counterparts of it. In some particular cases the gravitomagnetic field induced by the translational motion of the Sun and planets should be also taken into account for unambigious prediction of the light-ray deflection angle. In the present paper we describe the corresponding software program for taking into account all classical (proper motion, parallax, etc.) and relativistic (aberration, deflection of light) effects up to the microarcsecond threshold and demonstrate, using numerical simulations, how observations of stars and/or quasars conducted on board a space optical interferometer orbiting the Earth can be processed and disentangled.
dc.description5 pages, the talk given at the IAU Coll. 180 "Towards Models and Constants for Sub-Microarcsecond Astrometry", Washington DC, March 26 - April 2, 2000
dc.identifierhttps://arxiv.org/abs/gr-qc/0007007
dc.identifierhttp://arxiv.org/abs/gr-qc/0007007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/99683
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.titleNumerical Data-Processing Simulations of Microarcsecond Classical and Relativistic Effects in Space Astrometry
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