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| Titel |
The gravimeter “B-grave” for the in-situ surface gravity measurements of an asteroid |
| VerfasserIn |
Michel van Ruymbeke, Ozgur Karatekin, Jean Rasson, François Wielant, Phillipe Dumont, Birgit Ritter, Ping Zhu |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250129233
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| Publikation (Nr.) |
 EGU/EGU2016-9313.pdf |
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| Zusammenfassung |
| In the context of the preliminary study phase for the CubeSats supporting ESA’s Asteroid Impact Mission (AIM) to the Didymos, we investigate a miniaturized gravimeter as part of the geophysical instrument package for the Asteroid Geophysical Explorer (AGEX). AGEX intends to land a CubeSat on the secondary object in the Didymos system, Didymoon in order to characterize the asteroid surface and internal structure
A 3D compact gravimeter is developed at the Royal Observatory of Belgium. Its design allows to meter a weak 50 µm/sec² gravity field corresponding to 5 ppm of Earth gravity in a harsh environment. A system with three components mounted in an orthogonal geometry allows obtaining the gravity field in amplitude and in angular position without any requirement of levelling. B-GRAVES will use a in-situ calibration and multi-parameter approach for validation of the measurements.
A laboratory simulation is induced with centrifugal forces applied to the pendulum set-up in a vertical position to reject the Earth gravity field.
Signal treatment and uncertainties are discussed keeping in mind questions of thermal and vibration influence. The B-GRAVES can serve as a novel and robust instrument for future lander and rover missions . |
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