Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Balloon-Borne Millimeter-Wave Telescope for Cosmic Microwave
  Background Anisotropy Measurements   We report on the characteristics and design details of the Medium Scale
Anisotropy Measurement (MSAM), a millimeter-wave, balloon-borne telescope that
has been used to observe anisotropy in the Cosmic Microwave Background
Radiation (CMBR) on 0\fdg5 angular scales. The gondola is capable of
determining and maintaining absolute orientation to a few arcminutes during a
one-night flight. Emphasis is placed on the optical and pointing performance as
well as the weight and power budgets. We also discuss the total balloon/gondola
mechanical system. The pendulation from this system is a ubiquitous
perturbation on the pointing system. A detailed understanding in these areas is
needed for developing the next generation of balloon-borne instruments.

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The categories of this paper are: dg-ga
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
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The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio