Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Upward and Horizontal Tau Air-showers from Earth Crust Crowns: Traces of
  Highest Energy Neutrinos Beam Dump in Widest Volumes   The expected Ultra High Energy Neutrino signals from PeVs up to GZK energies
may arise as Upward and Horizontal Tau air Showers, UPTAUS and HORTAUS,
flashing toward mountain peaks, airplanes, balloons and satellites. The Areas,
Volumes and Masses from these Terrestrial Corona at each height are estimated
for present and future Tau Air-Showering experiments. While observing from high
mountains these masses are comparable to few km^3 volumes above EeVs neutrino
energies and they may even exceed 150 km^3 at GZK energies, (E > = 10^19 eV),
while being recording from a satellite looking toward terrestrial Horizontal
Crown edges from orbit altitudes.

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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
1
The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: bayes-an