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  DISCUS – The Deep Interior Scanning CubeSat mission to a rubble pile near-Earth asteroid

Bambach, P., Deller, J., Vilenius, E., Pursiainen, S., Takala, M., Braun, H. M., et al. (2018). DISCUS – The Deep Interior Scanning CubeSat mission to a rubble pile near-Earth asteroid. Advances in Space Research, 62(12), 3357-3368. doi:10.1016/j.asr.2018.06.016.

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 Creators:
Bambach, Patrick1, 2, Author              
Deller, Jakob1, 2, Author              
Vilenius, Esa1, Author              
Pursiainen, Sampsa, Author
Takala, Mika, Author
Braun, Hans Martin, Author
Lentz, Harald, Author
Wittig, Manfred, Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1832288              
2IMPRS for Solar System Science at the University of Göttingen, Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1832290              

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Free keywords: Deep-space CubeSat Near earth asteroid Rubble pile asteroid Radar Computed radar tomography
 Abstract: We have performed an initial stage conceptual design study for the Deep Interior Scanning CubeSat (DISCUS), a tandem 6U CubeSat carrying a bistatic radar as the main payload. DISCUS will be operated either as an independent mission or accompanying a larger one. It is designed to determine the internal macroporosity of a 260–600 m diameter Near Earth Asteroid (NEA) from a few kilometers distance. The main goal will be to achieve a global penetration with a low-frequency signal as well as to analyze the scattering strength for various different penetration depths and measurement positions. Moreover, the measurements will be inverted through a computed radar tomography (CRT) approach. The scientific data provided by DISCUS would bring more knowledge of the internal configuration of rubble pile asteroids and their collisional evolution in the Solar System. It would also advance the design of future asteroid deflection concepts. We aim at a single-unit (1U) radar design equipped with a half-wavelength dipole antenna. The radar will utilize a stepped-frequency modulation technique the baseline of which was developed for ESA’s technology projects GINGER and PIRA. The radar measurements will be used for CRT and shape reconstruction. The CubeSat will also be equipped with an optical camera system and laser altimeter to support navigation and shape reconstruction. We provide the details of the measurement methods to be applied along with the requirements derived from the known characteristics of rubble pile asteroids. Additionally, an initial design study of the platform and targets accessible within 20 lunar distances are presented.

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Language(s): eng - English
 Dates: 2018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.asr.2018.06.016
 Degree: -

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Title: Advances in Space Research
Source Genre: Journal
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Publ. Info: Elsevier
Pages: - Volume / Issue: 62 (12) Sequence Number: - Start / End Page: 3357 - 3368 Identifier: ISSN: 0273-1177
CoNE: https://pure.mpg.de/cone/journals/resource/0273-1177