Parabolic Drag-Free Flight, Actuation with Kicks, Spectral Analysis with Gaps |
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Authors: | Adrien Grynagier Walter Fichter Stefano Vitale |
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Institution: | 1. iFR, Universitaet Stuttgart, Pfaffenwaldring 7a, 70569, Stuttgart, Germany 2. Department of Physics, University of Trento, 38050, Povo, Italy
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Abstract: | The LISA Pathfinder Drift Mode is an experimental mode proposed for the LISA Pathfinder drag free space mission. The Drift Mode’s specificity is to switch off a possibly noisy actuator periodically in order to minimize the actuation noise. The experiment delivers a measurement that includes data segments virtually free of any actuation force noise. The corresponding acceleration data is then used to estimate the experiment disturbance spectrum, using a calibrating and gap-filling algorithm. This article focuses on two points to demonstrate the feasibility and interest of such an experiment: a first part is dedicated to experiment control and dynamics, whereas the second part explains how to solve the challenging problem posed by the data analysis. |
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