Acceleration disturbances and requirements for ASTROD I

Details Acceleration disturbances and requirements for ASTROD I Acceleration disturbances and requirements for ASTROD I

2005-06-02

arxiv.org/abs/gr-qc/0506012v2

Class.Quant.Grav. 23 (2006) 4415-4432

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pages, two figures, accepted for publication by Class. Quantum Grav. (at press)

Scientific paper

10.1088/0264-9381/23/13/008

ASTRODynamical Space Test of Relativity using Optical Devices I (ASTROD I) mainly aims at testing relativistic gravity and measuring the solar-system parameters with high precision, by carrying out laser ranging between a spacecraft in a solar orbit and ground stations. In order to achieve these goals, the magnitude of the total acceleration disturbance of the proof mass has to be less than 10−13 m s−2 Hz−1/2 at 0.1 m Hz. In this paper, we give a preliminary overview of the sources and magnitude of acceleration disturbances that could arise in the ASTROD I proof mass. Based on the estimates of the acceleration disturbances and by assuming a simple controlloop model, we infer requirements for ASTROD I. Our estimates show that most of the requirements for ASTROD I can be relaxed in comparison with Laser Interferometer Space Antenna (LISA).

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