Abstract
On December 3rd, 2014, the Japanese Space Agency (JAXA) launched successfully the Hayabusa2 (HY2) spacecraft to its journey to Near Earth asteroid (162173) Ryugu. Aboard this spacecraft is a compact landing package, MASCOT (Mobile Asteroid surface SCOuT), which was developed by the German Aerospace Centre (DLR) in collaboration with the Centre National d’Etudes Spatiales (CNES). Similar to the famous predecessor mission Hayabusa, Hayabusa2, will also study an asteroid and return samples to Earth. This time, however, the target is a C-type asteroid which is considered to be more primitive than (25143) Itokawa and provide insight into an even earlier stage of our Solar System.
Upon arrival at asteroid Ryugu in 2018, MASCOT will be released from the HY2 spacecraft and gently descend by free fall from an altitude of about 100 m to the surface of the asteroid. After a few bounces, the lander will come to rest at the surface and perform its scientific investigations of the surface structure and mineralogical composition, the thermal behaviour and the magnetic properties by operating its four scientific instruments. Those include an IR imaging spectrometer (MicrOmega, IAS Paris), a camera (MASCAM, DLR Berlin), a radiometer (MARA, DLR Berlin) and a magnetometer (MASMAG, TU Braunschweig).
In order to allow optimized payload operations the thermal design of MASCOT is required to cope with the contrasting requirements of the 4-year cruise in cold environment versus the hot conditions on the surface of the asteroid. Operations up to 2 asteroid days (∼16 hours) based on a primary battery are currently envisaged. A mobility mechanism allows locomotion on the surface. The mechanism is supported by an attitude and motion sensing system and an intelligent autonomy manager, which is implemented in the onboard software that enables MASCOT to operate fully independently when ground intervention is not available.
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Abbreviations
- ADC:
-
Analog-to-Digital Converter
- CFRP:
-
Carbon-Fibre-Reinforced Plastic
- CoG:
-
Center of Gravity
- DC:
-
Direct Current
- E-box:
-
Electronic Box
- EM:
-
Engineering Model
- EQM:
-
Engineering Quantification Model
- FM:
-
Flight Model
- FS:
-
Flight Spare
- FPGA:
-
Field Programmable Gate Array
- GNC:
-
Guidance, Navigation and Control
- HY2:
-
Hayabusa2
- LED:
-
Light-Emitting Diode
- MAM:
-
MASCOT Autonomy Manager
- MASCAM:
-
MASCOT CAMera
- MARA:
-
MASCOT Radiometer
- MASMAG:
-
MASCOT MAGnetometer
- MLI:
-
Multi-Layer Insulation
- MOSFET:
-
Metal-Oxide-Semiconductor Field-Effect Transistor
- MSC:
-
MASCOT
- NEA:
-
Non Explosive Actuator
- OBC:
-
On-board Computer
- OPS:
-
Optical Proximity Sensor
- PCDU:
-
Power Conditioning and Distribution Unit
- PCB:
-
Printed Circuit Board
- PEC:
-
Photoelectric Cell Sensor
- SAR:
-
Safe Activation Reaction
- SDVF:
-
Software Design and Validation Facility
- SLI:
-
Single Layer Insulation
- UMC:
-
Umbilical Separation Connecter
References
M. Abe, Y. Takagi, K. Kitazato, S. Abe, T. Hiroi, F. Vilas, B.E. Clark, B.P.A. Abell, S.M. Lederer, K.S. Jarvis, T. Nimura, Y. Ueda, A. Fujiwara, Near-infrared spectral results of asteroid Itokawa from the Hayabusa spacecraft. Science 312, 1334 (2006)
A. Accomazzo, P. Ferri, S. Lodiot et al., Rosetta operations at the comet. Acta Astronaut. 115, 434–441 (2015)
M.F. A’Hearn, M.J.S. Belton, A. Delamere, W.H. Blume, Deep Impact: a large-scale active experiment on a cometary nucleus. Space Sci. Rev. 117, 1 (2005a)
M.F. A’Hearn, M.J.S. Belton, W.A. Delamere, J. Kissel, K.P. Klaasen, L.A. McFadden, K.J. Meech, H.J. Melosh, P.H. Schultz, J.M. Sunshine, P.C. Thomas, J. Veverka, D.K. Yeomans, M.W. Baca, I. Busko, C.J. Crockett, S.M. Collins, M. Desnoyer, C.A. Eberhardy, C.M. Ernst, F.L. Farnham, L. Feaga, O. Groussin, D. Hampton, S.I. Ipatov, J-Y. Li, D. Lindler, C.M. Lisse, C.N. Mastrodemos, W.M. Owen, J.E. Richardson, D.D. Wellnitz, R.L. White, Deep Impact: excavating comet Tempel 1. Science 310, 258 (2005b)
M.A. Barucci, A.F. Cheng, P. Michel, L.A.M. Benner, R.P. Binzel, P.A. Bland, H. Böhnhardt, J.R. Brucato, A. Campo Bagatin, P. Cerroni, E. Dotto, A. Fitzsimmons, I. Franchi, S.F. Green, L.-M. Lara, J. Licandro, B. Marty, K. Muinonen, A. Nathues, J. Oberst, A.S. Rivkin, F. Robert, R. Saladino, J.M. Trigo-Rodriguez, S. Ulamec, M. Zolensky, MarcoPolo-R near Earth asteroid sample return mission. Exp. Astron. 33(2–3), 645–684 (2012)
J. Biele, S. Ulamec, Capabilities of Philae, the Rosetta lander. Space Sci. Rev. 138, 275–289 (2008)
J. Biele, S. Ulamec, M. Maibaum, R. Roll, L. Witte, J. Pablo Muñoz, W. Arnold, H.-U. Auster, C. Casas, C. Faber, C. Fantinati, F. Finke, H.-H. Fischer, K. Geurts, C. Güttler, P. Heinisch, A. Herique, S. Hviid, G. Kargl, M. Knapmeyer, J. Knollenberg, W. Kofman, N. Kömle, E. Kührt, V. Lommatsch, S. Mottola, R.P. de Santayana, E. Remetean, F. Scholten, K. Seidensticker, H. Sierks, T. Spohn, The landing(s) of Philae and inferences about comet surface mechanical properties. Science 349, 9816 (2015)
D.E. Brownlee, F. Horz, R.L. Newburn, M. Zolensky, T. Duxbury, C. Thomas, S. Sandford, Z. Sekanina, P. Tsou, M. Hanner, M.B.C. Clark, S.F. Green, J. Kissel, Surface of young Jupiter family comet 81 P/Wild 2: view from the Stardust spacecraft. Science 304, 1764 (2004)
Y.I. Cho, Thermal modelling of high rate Li-SOCl2 primary cylindrical cells. J. Electrochem. Soc. 134(4), 771–779 (1987)
E.T. Eisenmann, Lithium–thionyl chloride battery. State-of-the-art assessment, Sandia report SAND96-0839•UC-400, March 1996
T. Evans, T. Nguyen et al., A mathematical model of a lithium/thionyl chloride primary cell. J. Electrochem. Soc. 136(2), 328–339 (1989)
M. Grott, J. Knollenber, B. Borgs, F. Hänschke, E. Kessler, J. Helbert, A. Maturilli, N. Müller. The MASCOT radiometer MARA for the Hayabusa 2 mission, this special issue (2016)
A. Fujiwara, J. Kawaguchi, D.K. Yeomans, M. Abe, T. Mukai, T. Okada, J. Saito, H. Yano, M. Yoshikawa, D.J. Scheeres, O. Barnouin-Jha, A.F. Cheng, H. Demura, R.W. Gaskell, N. Hirata, H. Ikeda, T. Kominato, H. Miyamoto, A.M. Nakamura, R. Nakamura, S. Sasaki, K. Uesugi, The rubble-pile asteroid Itokawa as observed by Hayabusa. Science 312, 1330 (2006)
K.-H. Glassmeier, H. Boöhnhardt, D. Koschny, E. Kuü hrt, I. Richter, The Rosetta mission: flying towards the origins of the Solar System. Space Sci. Rev. 128, 1–21 (2007)
J.T. Grundmann, J. Biele, R. Findlay, S. Fredon, T.-M. Ho, C. Krause, S. Ulamec, C. Ziach, One shot to an asteroid—MASCOT and the design of an exclusively battery powered small spacecraft in hardware design examples and operational consideration, in European Space Power Conference, #3051 (2014),
D. Herčik, H.-U. Auster, J. Blum, K.-H. Fornacon, M. Fujimoto, K. Gebauer, C. Guttler, O. Hillenmaier, A. Hördt, I. Richter, B. Stoll, B. Weiss, K.-H. Glaßmeier, MasMag: the MASCOT magnetometer experiment, this special issue (2016)
R. Jaumann, J.P. Bibring, K.H. Glassmeier, M. Grott, T.M. Ho, S. Ulamec, N. Schmitz, H.U. Auster, J. Biele, H. Kuninaka, T. Okada, M. Yoshikawa, S. Watanabe, M. Fujimoto, T. Spohn, A. Koncz, A Mobile Asteroid Surface Scout (MASCOT) for the Hayabusa 2 mission, in LPSC, vol. 1777 (2014), p. 1817
R. Jaumann, N. Schmitz, A. Koncz, H. Michaelis, S. Schroeder, S. Mottola, F. Trauthan, H. Hoffmann, T. Roatsch, D. Jobs, J. Kachlicki, B. Pforte, R. Terzer, M. Tschentscher, S. Weisse, U. Mueller, T.-M. Ho, M. Grott, J.P. Bibring, J. Biele, S. Ulamec, B. Broll, A. Kruselburger, L. Perez-Prieto. The camera of the MASCOT asteroid lander on board Hayabusa-2, this special issue (2016)
H.-D. Joos, J. Bals, G. Looye, K. Schnepper, A. Varga, A multiobjective optimisation-based software environment for control systems design, in IEEE International Conference on Control Applications and International Symposium on Computer Aided Control Systems Design, Glasgow, Scotland, UK (2002), pp. 7–14
H.U. Keller, C. Arpigny, C. Barbieri, R.M. Bonnet, S. Cazes, M. Coradini, C.B. Cosmovici, W.A. Delamere, W.F. Huebner, D.W. Hughes, C. Jamar, D. Malaise, H.J. Reitsema, H.U. Schmidt, W.K.H. Schmidt, P. Seige, F.L. Whipple, K. Wilhelm, First Halley multicolour camera imaging results from Giotto. Nature 321, 326 (1986)
M. Lange, O. Mierheim, C.H. Hühne, MASCOT—structures design and qualification of an “organic” mobile lander platform for low gravity bodies, in Proc. of 13th European Conference on Space Structures, Materials & Environmental Testing. ESA SP-727, Braunschweig, Germany (2014)
M. Lange et al., MASCOT—a lightweight multi-purpose lander platform, in Proc. of 12th European Conference on Space Structures, Materials & Environmental Testing, ESA, SP-691, Noordwijk, The Netherlands (2012)
D.S. Lauretta (The OSIRIS-REx Team), An overview of the OSIRIS-Rex asteroid sample return mission, in 43rd Lunar and Planetary Science Conference, #2491 (2012)
R. Lichtenheldt, B. Schäfer, Hammering beneath the surface of Mars—Modellbildung und Optimierung des HP3-Mole, in Kolloquium Getriebetechnik, vol. 10, ed. by L. Zentner, Ilmenau (2013), pp. 169–186. ISBN 978-3-86360-065-5
R. Lichtenheldt, J. Spytek, J. Reill, Coaching MASCOT for broad-jumping: multi-criterial optimization of the arm trajectories for MASCOT’s hopping locomotion, in 11th Low-Cost Planetary Mission Conference, Berlin (2015)
T. Okada, K. Shirai, Y. Yamamoto, T. Arai, K. Ogawa, K. Hosono, M. Kato, X-ray fluorescence spectrometry of asteroid Itokawa by Hayabusa. Science 312, 1338 (2006)
R. Reinhard, The Giotto encounter with comet Halley. Nature 321, 313 (1986)
J. Saito, H. Miyamoto, R. Nakamura, M. Ishiguro, T. Michikami, A.M. Nakamura, H. Demura, S. Sasaki, N. Hirata, C. Honda, A. Yamamoto, Y. Yokota, T. Fuse, F. Yoshida, D.J. Tholen, R.W. Gaskell, T. Hashimoto, T. Kubota, Y. Higuchi, T. Nakamura, P. Smith, K. Hiraoka, T. Honda, S. Kobayashi, M. Furuya, N. Matsumoto, E. Nemoto, A. Yukishita, K. Kitazato, B. Dermawan, A. Sogame, J. Terazono, C. Shinohara, H. Akiyama, Detailed images of asteroid 25143 Itokawa from Hayabusa. Science 312, 1341 (2006)
R. Schulz, C. Alexander, H. Böhnhardt, K.-H. Glaßmeier (eds.), Rosetta—ESA’s Mission to the Origin of the Solar System (Springer, Berlin, 2009). ISBN 978-0-387-77517-3
M. Schlotterer, R. Findlay Ross, T.M. Ho, L. Witte, C. Ziach, Histogram filter for attitude determination of small asteroid lander, in 9th International ESA Conference on Guidance, Navigation & Control Systems. 2.–6. Juni 2014, Porto, Portugal (2014)
P.H. Schultz, C.A. Eberhardy, C.M. Ernst, M.F. A’Hearn, J.M. Sunshine, C.M. Lisse, The Deep Impact oblique impact cratering experiment. Icarus 191, 84 (2007)
H. Sierks, C. Barbieri, P.L. Lamy, R. Rodrigo, D. Koschny, H. Rickman, H.U. Keller, J. Agarwal, M.F. A’Hearn, F. Angrilli, A.-T. Auger, M.A. Barucci, J.-L. Bertaux, I. Bertini, S. Besse, D. Bodewits, C. Capanna, G. Cremonese, V. Da Deppo, B. Davidsson, S. Debei, M. De Cecco, F. Ferri, S. Fornasier, M. Fulle, R. Gaskell, L. Giacomini, O. Groussin, P. Gutierrez-Marques, P.J. Gutiérrez, C. Güttler, N. Hoekzema, S.F. Hviid, W.-H. Ip, L. Jorda, J. Knollenberg, G. Kovacs, J.R. Kramm, E. Kührt, M. Küppers, F. La Forgia, L.M. Lara, M. Lazzarin, C. Leyrat, J.J. Lopez Moreno, S. Magrin, S. Marchi, F. Marzari, M. Massironi, H. Michalik, R. Moissl, S. Mottola, G. Naletto, N. Oklay, M. Pajola, M. Pertile, F. Preusker, L. Sabau, F. Scholten, C. Snodgrass, N. Thomas, C. Tubiana, J.B. Vincent, K.P. Wenzel, M. Zaccariotto, M. Pätzold, On the nucleus structure and activity of comet 67P/Churyumov–Gerasimenko. Science 347, 6220 (2015)
R.M. Spotnitz, G.S. Yeduvaka, G. Nagasubramanian, R. Jungst, Modeling self-discharge of Li/SOCl2 cells. J. Power Sources 163, 578 (2006)
J.M. Sunshine, O. Groussin, P.H. Schultz, M.F. A’Hearn, L.M. Feaga, T.L. Farnham, K.P. Klaasen, The distribution of water ice in the interior of comet Tempel 1. Icarus 191, 73 (2007)
Y. Tsuda, M. Yoshikawa, M. Abe, H. Minamino, S. Nakazawa, System design of the Hayabusa2—asteroid sample return mission to 1999JU3. Acta Astronaut. 91, 356–362 (2013)
S. Ulamec, J. Biele, Surface elements and landing strategies for small bodies missions—Philae and beyond. Adv. Space Res. 47, 847–858 (2009)
S. Ulamec, J. Biele, P.-W. Bousquet, P. Gaudon, K. Geurts, T.-M. Ho, C. Krause, C. Lange, R. Willnecker, L. Witte, Landing on small bodies: from the Rosetta lander to MASCOT and beyond. Acta Astronaut. 93, 460–466 (2014)
S. Ulamec, J. Biele, A. Blazquez, B. Cozzoni, C. Fantinati, P. Gaudon, K. Geurts, E. Jurado, O. Küchemann, V. Lommatsch, M. Maibaum, H. Sierks, L. Witte, Rosetta lander—Philae: landing preparations. Acta Astron. 107, 79–86 (2015)
J. Veverka, M. Belton, K. Klaasen, C. Chapman, Galileo’s encounter with 951 Gaspra: overview. Icarus 107(1), 2–17 (1994)
T. Yoshimitsu, T. Kubota, I. Nakatani, The operation and scientific data of MINERVA rover in Hayabusa mission, in 36th COSPAR Scientific Assembly, #2987 (2006)
Acknowledgements
MASCOT was developed and built under the leadership of the German Aerospace Center (DLR) with contributions (battery and PCDU subsystems) from the Centre National d’Études Spatiales (CNES) and Japan Aerospace Exploration Agency (JAXA).
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Ho, TM., Baturkin, V., Grimm, C. et al. MASCOT—The Mobile Asteroid Surface Scout Onboard the Hayabusa2 Mission. Space Sci Rev 208, 339–374 (2017). https://doi.org/10.1007/s11214-016-0251-6
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DOI: https://doi.org/10.1007/s11214-016-0251-6