Candidate Sample Acquisition System for the Rosetta Mission

Details Candidate Sample Acquisition System for the Rosetta Mission Candidate Sample Acquisition System for the Rosetta Mission

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997arcn.rept..417m&link_type=abstract

Analysis of Returned Comet Nucleus Samples, Proceedings of a Workshop held at Milpitas, California, 16-18 January, 1989. Compil

Physics

Comet Nuclei, Core Sampling, Samples, Comets, Samplers, Surface Properties, Galactic Structure, Giotto Mission, Chemical Analysis, Composition (Property), Physical Properties

Scientific paper

The Comet Nucleus Sample Return (CNSR) Mission, is a cornerstone of ESA scientific program. While Giotto, Vega I and II provided the first picture of a comet nucleus, a much improved understanding of the nucleus and processes on it will result from in situ measurements and Earth based analysis of the material samples collected on the nucleus surface. The CNSR baseline mission foresees the landing and anchoring of a spacecraft on the comet nucleus surface, and the collection of the following three types of samples by means of a dedicated "Sample Acquisition System" (SAS): (1) a core sample gathered from surface down to a maximum depth of 3 meters to be cut in 0,5 m. long sections for storage; (2) a volatile material sample, to be gathered at the bottom of the core sample hole; and (3) a surface material sample, gathered from one or more locations on the surface. These samples will have to be placed in a storage canister in the capsule (to be returned on Earth) and preserved therein at a temperature not higher than 160 k. If on board sensing instrumentation identified comet nucleus features not allowing a safe landing, a back-up system based on a 'harpoon" sampler, would be launched from the spacecraft hovering the comet, and recovered via a tether line; degraded sample quality would be accepted in this case (no surface and volatile samples and limited core sampling depth).

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