The Impact of Atmospheric Fluctuations on Degree‐Scale Imaging of the Cosmic Microwave Background
The Astrophysical JournalPublished 10 November 2000Open access
Oliver P. Lay, N. W. Halverson
Citations74
SJR quartileQ1
SJR score2.04
SNIP1.25
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Abstract
Fluctuations in the brightness of the Earth's atmosphere originating from water vapor are an important source of noise for ground-based instruments attempting to measure anisotropy in the Cosmic Microwave Background. This paper presents a model for the atmospheric fluctuations and derives simple expressions to predict the contribution of the atmosphere to experimental measurements. Data from the South Pole and from the Atacama Desert in Chile, two of the driest places on Earth, are used to assess the level of fluctuations at each site.
Keywords
Physics and Astronomy
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