Rievers, B. and Bremer, Stefanie and List, Meike and Wöske, Florian (2019) Evaluating atmospheric density with MICROSCOPE data. In: Proceedings of the International Astronautical Congress, IAC. 70th International Astronautical Congress, 2019-10-21 - 2019-10-25, Washigton D.C., United States.
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Abstract
In April 2016 the French satellite MICROSCOPE was finally launched after more than 15 years of preparation. The main mission goal was a test of the weak equivalence principle to an accuracy of 1E-15 by means of two high-precision accurate differential accelerometers. After an initial evaluation of a small part of the acquired data the determination of the Eötvös parameter characterizing the relative difference in test mass free-fall acceleration has already been improved by one order of magnitude compared to what has been achieved by means of torsion balance experiments. Further improvements are expected from an evaluation of the complete data sets as well as improved characterization of major noise drivers. After completion of the main scientific measurements in late 2018, CNES opened up the remaining mission time for additional experiment ideas. Following an international proposal with French, German and Dutch contributions an aeronomy experiment was one of the dedicated tasks chosen for MICROSCOPE during its remaining mission lifetime mainly limited by the availability of cold gas. We present the details of the experiment and highlight our approach for an evaluation of the accelerometer data to extract information on the atmospheric density. We employ a high precision modeling approach to estimate the magnitude of non-gravitational and inertial forces and to subsequently filter the measured acceleration to determine the fraction of the total acceleration that can be credited to drag. We furthermore discuss our approach on the estimation of accelerometer bias and scale factors as well as first results from the obtained data sets.
Item URL in elib: | https://elib.dlr.de/130042/ | ||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
Title: | Evaluating atmospheric density with MICROSCOPE data | ||||||||||||||||||||
Authors: |
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Date: | 21 October 2019 | ||||||||||||||||||||
Journal or Publication Title: | Proceedings of the International Astronautical Congress, IAC | ||||||||||||||||||||
Refereed publication: | No | ||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||
Status: | Published | ||||||||||||||||||||
Keywords: | MICROSCOPE, Aeronomy | ||||||||||||||||||||
Event Title: | 70th International Astronautical Congress | ||||||||||||||||||||
Event Location: | Washigton D.C., United States | ||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||
Event Start Date: | 21 October 2019 | ||||||||||||||||||||
Event End Date: | 25 October 2019 | ||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||
HGF - Program Themes: | other | ||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||
DLR - Program: | R - no assignment | ||||||||||||||||||||
DLR - Research theme (Project): | R - no assignment | ||||||||||||||||||||
Location: | Bremen | ||||||||||||||||||||
Institutes and Institutions: | Institute of Space Systems > Navigation and Control Systems Institute for Satellite Geodesy and Inertial Sensing | ||||||||||||||||||||
Deposited By: | Bremer, Dr.-Ing. Stefanie | ||||||||||||||||||||
Deposited On: | 19 Nov 2019 13:07 | ||||||||||||||||||||
Last Modified: | 24 Apr 2024 20:33 |
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