Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: VIPER - Student research on extraterrestrial ice penetration technology   Recent analysis of scientific data from Cassini and earth-based observations
gave evidence for a global ocean under a surrounding solid ice shell on
Saturn's moon Enceladus. Images of Enceladus' South Pole showed several
fissures in the ice shell with plumes constantly exhausting frozen water
particles, building up the E-Ring, one of the outer rings of Saturn. In this
southern region of Enceladus, the ice shell is considered to be as thin as 2
km, about an order of magnitude thinner than on the rest of the moon. Under the
ice shell, there is a global ocean consisting of liquid water. Scientists are
discussing different approaches the possibilities of taking samples of water,
i.e. by melting through the ice using a melting probe. FH Aachen UAS developed
a prototype of maneuverable melting probe which can navigate through the ice
that has already been tested successfully in a terrestrial environment. This
means no atmosphere and or ambient pressure, low ice temperatures of around 100
to 150 K (near the South Pole) and a very low gravity of 0.114 m/s$^2$ or 1100
{\mu}g. Two of these influencing measures are about to be investigated at FH
Aachen UAS in 2017, low ice temperature and low ambient pressure below the
triple point of water. Low gravity cannot be easily simulated inside a large
experiment chamber, though. Numerical simulations of the melting process at
RWTH Aachen however are showing a gravity dependence of melting behavior.
Considering this aspect, VIPER provides a link between large-scale experimental
simulations at FH Aachen UAS and numerical simulations at RWTH Aachen. To
analyze the melting process, about 90 seconds of experiment time in reduced
gravity and low ambient pressure is provided by the REXUS rocket.

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The categories of this paper are: eess
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph