Authors:
F. Scholten1*, F. Preusker1, S. Elgner1, K.-D. Matz1, R. Jaumann1, M. Hamm1, S.E. Schröder1, A. Koncz1, N. Schmitz1, F. Trauthan1, M. Grott1, J. Biele2, T.-M. Ho3, S. Kameda4, S. Sugita5,6,
Affiliations:
1 German Aerospace Center (DLR), Institute of Planetary Research, 12489 Berlin, Germany
2 German Aerospace Center (DLR), Microgravity User Support Center (MUSC), Cologne, Germany
3 German Aerospace Center (DLR), Institute of Space Systems, Bremen, Germany
4 Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo, Japan
5 University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, Japan
6 Planetary Exploration Research Center, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba, Japan
*Correspondence to: Frank Scholten
Astronomy & Astrophysics, 634, L5 (2019) DOI: 10.1051/0004-6361/201936760
Abstract:
After its release and a descent and bouncing phase, the Hayabusa2 lander MASCOT came to a final rest and MASCOT's camera MASCam acquired a set of images of the surface of Ryugu. With MASCam's instantaneuos field of view (IFOV) of about 1 mrad, the images provide pixel scales from 0.2-0.5 mm/pixel in the foreground and up to 1 cm/pixel for surface parts in the background. Using a stereo-photogrammetric (SPG) analysis of the MASCam images, taken from slightly different positions due to commanded and unintentional movements of the MASCOT lander, we were able to determine the orientation of MASCam and MASCOT for the different measurement positions. We derived a 3D surface model of MASCOT's vicinity. Although the conditions for 3D stereo processing were poor due to very small stereo angles, the derived 3D model has about 0.5 cm accuracy in the foreground at 20 cm distance and about 1.5 cm at a distance of 40-50 cm.
Local MASCam model integrated in a 50 m x 50 m subset of the ONC context model.