Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Assessments of Ali, Dome A, and Summit Camp for Mm-wave Observations
  Using MERRA-2 Reanalysis   The latest MERRA-2 reanalysis of the modern satellite measurements provides
unprecedented uniformity and fidelity for the atmospheric data. In this paper,
these data are used to evaluate five sites for millimeter-wave (mm-wave)
observations. These include two established sites (South Pole and Chajnantor,
Atacama), and three new sites (Ali, Tibet; Dome A, Antarctica; and Summit Camp,
Greenland). Atmospheric properties including precipitable water vapor (PWV),
sky brightness temperature fluctuations, ice and liquid water paths are derived
and compared. Dome A emerges to be the best among those evaluated, with PWV and
fluctuations smaller than the second-best site, South Pole, by more than a
factor of 2. It is found that the higher site in Ali (6,100 m) is on par with
Cerro Chajnantor (5,612 m) in terms of transmission and stability. The lower
site in Ali (5,250 m) planned for first stage of observations at 90/150GHz
provides conditions comparable to those on the Chajnantor Plateau. These
analyses confirm Ali to be an excellent mm-wave site on the Northern Hemisphere
that will complement well-established sites on the Southern Hemisphere. It is
also found in this analysis that the observing conditions at Summit Camp are
comparable to Cerro Chajnantor. Although it is more affected by the presence of
liquid water clouds.

27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys