Robson, M. and O'Sullivan, Créidhe and Scott, P F and Duffett-Smith, P. J. (1994) Observations of atmospheric noise fluctuations with a metre-baseline interferometer in the 13-17 GHz band. Astronomy & Astrophysics, 286. pp. 1028-1032. ISSN 0004-6361

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Abstract

This paper describes the atmospheric noise fluctuations that we have observed with the Cosmic Anisotropy Telescope (CAT) at Cambridge. The CAT is a short baseline radio interferometer designed to make observations of primordial anisotropies in the Cosmic Microwave Background Radiation at angular scales between 20 arcminutes and 1 degree. During clear weather the observations are limited by receiver noise, whereas emission and scattering from clouds limits the sensitivity of the instrument during rain and cloudy weather on the very shortest baselines. Fluctuations in the correlated antenna temperature up to 100 mK have been seen, with a typical coherence time of 10 seconds.

Item Type:	Article
Keywords:	atmospheric effects; instrumentation; interferometers; techniques; interferometric;
Academic Unit:	Faculty of Science and Engineering > Experimental Physics
Item ID:	18860
Depositing User:	Dr. Créidhe O'Sullivan
Date Deposited:	10 Sep 2024 15:28
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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