Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instrumentation for the Citizen CATE Experiment: Faroe Islands and
  Indonesia   The inner regions of the solar corona from 1-2.5 Rsun are poorly sampled both
from the ground and space telescopes. A solar eclipse reduces the sky scattered
background intensity by a factor of about 10,000 and opens a window to view
this region directly. The goal of the Citizen {\it Continental-America
Telescopic Eclipse} (CATE) Experiment is to take a 90-minute time sequence of
calibrated white light images of this coronal region using 60 identical
telescopes spread from Oregon to South Carolina during the 21 August 2017 total
solar eclipse. Observations that can address questions of coronal dynamics in
this region can be collected with rather modest telescope equipment, but the
large dynamic range of the coronal brightness requires careful camera control.
The instruments used for test runs on the Faroe Islands in 2015 and at five
sites in Indonesia in 2016 are described. Intensity calibration of the coronal
images is done and compared with previous eclipse measurements from November \&
Koutchmy (1996) and Bazin et al. (2015). The change of coronal brightness with
distance from the Sun seen in the 2016 eclipse agrees with observations from
the 1991 eclipse but differ substantially from the 2010 eclipse. The 2015
observations agree with 2016 and 1991 solar radii near the Sun, but are fainter
at larger distances. Problems encountered during these test runs are discussed
as well the solutions which will be implemented for the 2017 eclipse
experiment.

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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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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: math
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin