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A radar package for asteroid subsurface investigations: Implications of implementing and integration into the MASCOT nanoscale landing platform from science requirements to baseline design

Alain Hérique 1 Dirk Plettemeier 2 Caroline Lange 3 Jan Thimo Grundmann 3 Valérie Ciarletti 4 Tra-Mi Ho 3 Wlodek Kofman 1, 5 Benoit Agnus 6 Jun Du 5 Wenzhe Fa 5 Oriane Gassot 1 Ricardo Granados-Alfaro 1 Jerzy Grygorczuk 7 Ronny Hahnel 2 Christophe Hoarau 8 Martin Laabs 2 Christophe Le Gac 6 Marco Mütze 2, 6 Sylvain Rochat 1 Yves Rogez 1 Marta Tokarz 9 Petr Schaffer 2 André-Jean Vieau 6 Jens Biele 10 Christopher Buck 11 Jesus Gil Fernandez 11 Christian Krause 10 Raquel Rodriguez Suquet 12 Stephan Ulamec 13
1 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
2 TUD - Technische Universität Dresden
3 DLR Institute of Space Systems
4 IMPEC - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
5 CBK - Space Research Centre of Polish Academy of Sciences
6 LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
7 IRSGIS - Institute of Remote Sensing and Geographic Information System
8 ElecLab - Electronique
NEEL - Institut Néel
9 ASTRONIKA Sp. Zo.o.
10 DLR - German Aerospace Center
11 ESTEC - European Space Research and Technology Centre
12 CNES - Centre National d'Études Spatiales [Toulouse]
13 DLR - Deutsches Zentrum für Luft- und Raumfahrt
Abstract : The internal structure of asteroids is still poorly known and has never been analyzed directly by measurements. Our knowledge relies entirely on inferences from remote sensing observations of the surface and theoretical modeling. Direct measurements are crucial to characterize an asteroid's internal structure and heterogeneity from sub-metric to global scale. The radar package developed in the frame of the phase A/B1 of the Asteroid Impact Mission (AIM) as part of the larger Asteroid Impact & Deflection Assessment (AIDA) mission is a mature instrument suite to answer this question and to improve our ability to understand and model the mechanisms driving Near Earth Asteroids (NEA). It is of main interest for science, exploration and planetary defense. This instrument suite consists of a monostatic high frequency radar (HFR) to investigate the stratigraphy of surface regolith and a bistatic low frequency radar (LFR) to characterize the deep interior. The chosen platform to deliver the surface unit of the LFR and other instruments for a close-up study of the target asteroid is the MASCOT nanolander, which already flies on Hayabusa2 (HY2) in a mineralogy scout configuration. In this paper, we present the chosen instrumentation for radar science, baseline mission requirements and the initial design for integration into the lander platform, including all peculiarities and constraints.
Keywords : AIDA/AIM Asteroid Planetary defense Radar tomography MASCOT lander Radar sounding
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Alain Hérique, Dirk Plettemeier, Caroline Lange, Jan Thimo Grundmann, Valérie Ciarletti, et al.. A radar package for asteroid subsurface investigations: Implications of implementing and integration into the MASCOT nanoscale landing platform from science requirements to baseline design. Acta Astronautica, Elsevier, 2019, 156, pp.317-329. ⟨10.1016/j.actaastro.2018.03.058⟩. ⟨insu-01757087⟩

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