INFLUENCE OF THE MEASUREMENT PROCESSING IN THE DETERMINATION OF THE EQUIVALENCE PRINCIPLE VIOLATION SIGNAL FOR THE MICROSCOPE EXPERIMENT - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

INFLUENCE OF THE MEASUREMENT PROCESSING IN THE DETERMINATION OF THE EQUIVALENCE PRINCIPLE VIOLATION SIGNAL FOR THE MICROSCOPE EXPERIMENT

Résumé

The MICROSCOPE space mission 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 satellite which includes two cylindrical test masses submitted to the same gravitational field and made of different materials. This high precision experiment is compatible with only very little perturbations. But the mathematical process applied to extract the signal at the EP violation frequency introduces numerical effects which perturb the measurement analysis. Aliasing arises from the finite time span of the measurement, and is amplified by possible small irregularities in the sampling due to telemetry losses. Numerical simulations have been run to estimate the projection rate of a perturbation at any frequency on the EP violation frequency and to test its compatibility with the mission specifications. Moreover, different procedures for the data analysis have been considered to select the one minimizing these effects taking into account the uncertainty about the frequencies of the implicated signals. After an overall presentation of the MICROSCOPE mission, this paper will focus on the numerical perturbations introduced during the data processing of the scientific measurement and describe the considered methods to minimize them.
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Dates et versions

insu-04454659 , version 1 (13-02-2024)

Identifiants

  • HAL Id : insu-04454659 , version 1

Citer

Emilie Hardy, Agnes Levy, Gilles Metris, Alain Robert, Manuel Rodrigues, et al.. INFLUENCE OF THE MEASUREMENT PROCESSING IN THE DETERMINATION OF THE EQUIVALENCE PRINCIPLE VIOLATION SIGNAL FOR THE MICROSCOPE EXPERIMENT. Semaine de l'astrophysique, Jun 2012, Nice, France. ⟨insu-04454659⟩
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