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Telemicroscopy and close-up imaging for the Rosetta Landers

Mottola, S. and Arnold, G. and Hirsch, H. and Jaumann, R. and Kührt, E. and Lorenz, E. and Neukum, G. and Wäsch, R: (1994) Telemicroscopy and close-up imaging for the Rosetta Landers. Workshop on ROSETTA Surface Science, ESTEC, Noordwijk, 26-27 Sept. 194.

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Abstract

Microscopic imaging allows to study the fine-scale texture and morphology of the cometary surface. The analysis supplements the surface mapping by the orbital Narrow Angle Camera at the landing site of the Rosetta lander systems. The microstructure of the cometary surface is almost unknown and of high interest. The texture influences several physical properties of the comet like surface temperature, heat and gas flow through the surface, density of the surface layer, thermal diffusion and activity behavior. From theoretical models about the origin of comets and from GIOTTO measurements one can expect dust grains containing organic components in the micron to millimeter range. These particles can becemented and form a coherent crust. Although it will be less likely to see exposed ice deposits at the non-active surface, the presence of ice grains cannot be excluded. Also, low density dust deposits coud be present. For this reason, monitoring of the texture and small scale features with a spatial resolution better than 100 m is recommended. In addition to microscopic study, wide-field imaging of areas in the vicinity of the lander is necessary both for giving context to the close-up measurements and for supporting other experiments. For this reason a certain panorama imaging capability is also recommended. We propose for the Rosetta lander systems a camera concept which allows to obtain images of the surface with high spatil resolution (better than 50 m/pix) and a moderate field of view at infinity. Spectral capabilities can be achieved by means of spectral filters in the VIS-NIR range. As possible alternatives, a stand-alone telemicroscope and a stand-alone panorama camera will be discussed.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1994,
Title:Telemicroscopy and close-up imaging for the Rosetta Landers
Authors:
AuthorsInstitution or Email of Authors
Mottola, S.UNSPECIFIED
Arnold, G.UNSPECIFIED
Hirsch, H.UNSPECIFIED
Jaumann, R.UNSPECIFIED
Kührt, E.UNSPECIFIED
Lorenz, E.UNSPECIFIED
Neukum, G.UNSPECIFIED
Wäsch, R:UNSPECIFIED
Date:1994
Status:Published
Event Title:Workshop on ROSETTA Surface Science, ESTEC, Noordwijk, 26-27 Sept. 194
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Institut für Planetenerkundung
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 09:47

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