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Acceleration disturbances and requirements for ASTROD I

Sachie Shiomi·Wei-Tou Ni
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Abstract

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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Sachie Shiomi, Wei-Tou Ni. 2006-06-15. Acceleration disturbances and requirements for ASTROD I. https://doi.org/10.1088/0264-9381%2F23%2F13%2F008

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