In-flight calibration of the MICROSCOPE space mission instrument: development of the simulator

Details In-flight calibration of the MICROSCOPE space mission instrument: development of the simulator In-flight calibration of the MICROSCOPE space mission instrument: development of the simulator

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sf2a.conf..647h&link_type=abstract

SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: G. Alecian, K. Belkacem,

Astronomy and Astrophysics

Astrophysics

Microscope, Test Of The Equivalence Principle, Space Accelerometer, Calibration, Simulator

Scientific paper

The space mission MICROSCOPE aims at testing the Equivalence Principle (EP) with an accuracy of 10^{-15}. The test is based on the precise measurement delivered by a differential electrostatic accelerometer onboard a drag-free microsatellite which includes two cylindrical test masses submitted to the same gravitational field and made of different materials. The accuracy of the measurement exploited for the EP test is limited by our knowledge of the physical parameters of the instrument. The on-ground evaluation of these parameters is not precise enough. An in-orbit calibration is therefore needed to finely characterize these instrumental parameters in order to correct the measurements. The calibration procedures have been proposed and their analytical performances have been evaluated. In addition, a software simulator including models of the instrument and the satellite drag-free system has been developed. After an overall presentation of the MICROSCOPE mission, this paper will focus on the description of the simulator used to confirm and validate the specific procedures which are planned to determine in-orbit the exact values of the driving parameters of the instrument.

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