Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atmospheric considerations for the CTA site search   The Cherenkov Telescope Array (CTA) will be the next high-energy gamma-ray
observatory. Selection of the sites, one in each hemisphere, is not obvious
since several factors have to be taken into account. Among them, and probably
the most crucial, are the atmospheric conditions. Since July 2012, the site
working group has deployed automatic ground based instrumentation (ATMOSCOPE)
on all the candidate sites. Due to the limited time span available from ground
based data, long term weather forecast models become necessary tools for site
characterization. It is then of prime importance to validate the models by
comparing it to the ATMOSCOPE measurements. We will describe the sources of
data (ATMOSCOPE, weather forecasting model and satellite data) for the site
evaluation and how they will be used and combined.

23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph