Showing papers by "Stephan Ulamec published in 2020"
TL;DR: In this paper, the key technologies and the instrumentation required for the subsurface exploration of ocean worlds are discussed and the focus is laid on Jupiter's moon Europa and Saturn's moon Enceladus.
Abstract: In this chapter, the key technologies and the instrumentation required for the subsurface exploration of ocean worlds are discussed The focus is laid on Jupiter’s moon Europa and Saturn’s moon Enceladus because they have the highest potential for such missions in the near future The exploration of their oceans requires landing on the surface, penetrating the thick ice shell with an ice-penetrating probe, and probably diving with an underwater vehicle through dozens of kilometers of water to the ocean floor, to have the chance to find life, if it exists Technologically, such missions are extremely challenging The required key technologies include power generation, communications, pressure resistance, radiation hardness, corrosion protection, navigation, miniaturization, autonomy, and sterilization and cleaning Simpler mission concepts involve impactors and penetrators or – in the case of Enceladus – plume-fly-through missions
26 citations
TL;DR: In this paper, the authors compare the benefits and drawbacks of the MASCOT-type surface packages in the 10-kilogram and 10-cubic-decimeter class with the smaller (volume ~1 cubic decimeter and mass).
7 citations
01 Mar 2020
TL;DR: Schroeder et al. as discussed by the authors proposed a method to detect the presence of asteroids in the Earth's magnetic field using optical sensor data from the German Aerospace Center (DLR).
Abstract: 1 *, T. Belenguer 2 , U. Böttger 1 , M. Buder 1 , Y. Cho 3 , E. Dietz 1 , M. Gensch 1 , T. Hagelschuer 1 , F. Hanke 1 , H.-W. Hübers 1 , S. Kameda 4 , E. Kopp 1 , S. Kubitza 1 , A. Moral 2 , C. Paproth 1 , M. Pertenais 1 , G. Peter 1 , K. Rammelkamp 1 , P. Rodriguez 2 , F. Rull 5 , C. Ryan 1 , T. Säuberlich 1 , F. Schrandt 1 , S. Ulamec 6 , T. Usui 7 , R. Vance 1 . 1 German Aerospace Center (DLR), Institute of Optical Sensor Systems, Berlin, Germany. 2 Instituto National de Técnica Aerospacial (INTA), Torrejón de Ardoz, Spain. 3 Department of Earth and Planetary Science, The University of Tokyo, Tokyo, Japan. 4 Department of Physics, College of Science, Rikkyo University, Tokyo, Japan. 5 Universidad de Valladolid –Unidad Asociada UVa-CSIC Centro de Astrobiologia, Valladolid, Spain. 6 German Aerospace Center (DLR), Microgravity User Support Center, Cologne, Germany. 7 Japan Aerospace Exploration Agency (JAXA), Institute of Space and Astronautical Science, Department of Solar System Sciences, Kanagawa, Japan. (*Susanne.Schroeder [at] dlr.de).
5 citations
12 Oct 2020
TL;DR: Hera as mentioned in this paper is the European contribution to the international Asteroid Impact and Deflection Assessment (AIDA) collaboration and will contribute to the first deflection test of an asteroid, in the framework of the international NASA- and ESA supportedAIDA collaboration.
Abstract: The Hera mission has been approved for development and launch in the new ESA Space SafetyProgramme by the ESA Council at Ministerial Level, Space19+, in November 2019. Hera will contributeto the first deflection test of an asteroid, in the framework of the international NASA- and ESA supportedAsteroid Impact and Deflection Assessment (AIDA) collaboration.The impact of the NASA DART (Double Asteroid Redirection Test) spacecraft on the natural satelliteof the binary asteroid Didymos in late September 2022 will change its orbital period around Didymos.As Didymos is an eclipsing binary, and close to the Earth on this date, the change can be detected byEarth-based observers. ESA’s Hera spacecraft will rendezvous with Didymos four years after the impact.While performing the measurements necessary to understand the effect of the DART impact on Didymos’secondary, in particular its mass, its internal structure, the direct determination of the momentum transferand the detailed characterization of the crater left by DART, Hera will provide unique information onmany current issues in asteroid science.Hera will rendezvous for the first time with a binary asteroid, and in particular its secondary, of only160 m in diameter. So far, no mission has visited such a small rock in space. Moreover, for the firsttime, internal and subsurface properties will be directly measured. How do binaries form? What does a160 m-size rock in space look like? What are its internal properties? And what will be the size and themorphology of the crater left by DART, which will provide the first impact experiment at full asteroid scaleusing an impact speed close to the average speed between asteroids? What will be the exact momentumtransferred by DART, which needs the precise measurement of the mass of the target by Hera? Thesequestions and many others will be addressed by Hera as a natural outcome of its investigations focusedon planetary defense.The scientific legacy of the Hera mission will extend far beyond the core aims of planetary defense.Hera is thus the European contribution to the international asteroid exploration era.Acknowledgement: The authors acknowledge funding support from ESA and from the EuropeanUnion’s Horizon 2020 research and innovation programme under grant agreement No 870377 (projectNEO-MAPP).
1 citations