RadioAstron as a target and as an instrument: Enhancing the Space VLBI mission's scientific output

被引：10

作者：

Duev, D. A. ^{[1
,2
]}

Zakhvatkin, M. V. ^{[3
]}

Stepanyants, V. A. ^{[3
]}

Molera Calves, G. ^{[1
,4
]}

Pogrebenko, S. V. ^{[1
]}

Gurvits, L. I. ^{[1
,5
]}

Cimo, G. ^{[1
]}

Bahamon, T. M. Bocanegra ^{[1
,6
]}

机构：

[1] Joint Inst VLBI Europe, POB 2, NL-7990 AA Dwingeloo, Netherlands

[2] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119991, Russia

[3] Russian Acad Sci, Keldysh Inst Appl Math, Moscow 125047, Russia

[4] Aalto Univ, Metsahovi Radio Observ, Kylmala 02540, Finland

[5] Delft Univ Technol, Dept Astrodynam & Space Mission, NL-2629 HS Delft, Netherlands

[6] Shanghai Astron Observ, Shanghai 200030, Peoples R China

来源：

ASTRONOMY & ASTROPHYSICS | 2015年 / 573卷

关键词：

astrometry; techniques: interferometric; instrumentation: interferometers; instrumentation: miscellaneous; TELESCOPE; SIGNAL;

D O I：

10.1051/0004-6361/201424940

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The accuracy of orbit determination has a strong impact on the scientific output of the Space VLBI mission RadioAstron. Aims. The aim of this work is to improve the RadioAstron orbit reconstruction by means of sophisticated dynamical modelling of its motion in combination with multi-station Doppler tracking of the RadioAstron spacecraft. Methods. The improved orbital solution is demonstrated using Doppler measurements of the RadioAstron downlink signal and by correlating VLBI observations made by RadioAstron with ground-based telescopes using the enhanced orbit determination data. Results. Orbit determination accuracy has been significantly improved from similar to 600 m in 3D position and similar to 2 cm/s in 3D velocity to several tens of metres and mm/s, respectively.

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