MICROSCOPE On-ground and In-orbit Calibration

Details MICROSCOPE On-ground and In-orbit Calibration MICROSCOPE On-ground and In-orbit Calibration

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ssrv..151...25j&link_type=abstract

Space Science Reviews, Volume 151, Issue 1-3, pp. 25-38

Computer Science

Performance

Equivalence Principle, Gravity, Microscope, Calibration, Accelerometer

Scientific paper

The MICROSCOPE mission, to be launched in 2011, will perform the test of the universality of free fall (Equivalence Principle) to an accuracy of 10-15. The payload consists of two sensors, each controlling the free fall of a pair of test masses: the first for the test of the Equivalence Principle (titanium/platinum), the second for performance verification (platinum/platinum). The capability to detect a faint violation signal of the EP test is conditioned upon the rejection of disturbances arising from the coupling and misalignments of the instrument vectorial outputs. Therefore the performance of the mission depends on the success of the series of calibration operations which are planned during the satellite life in orbit. These operations involve forced motion of the masses with respect to the satellite. Specific data processing tools and simulations are integral parts of the calibration and performance enhancement process, as are the tests operated on ground at the ZARM drop tower. The presentation will focus on the current status of the MICROSCOPE payload, the rationale for the in-orbit calibrations, the data processing operations and the tests performed at the ZARM drop tower.

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