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Compression of Visibility Data for Murchison Widefield Array

2014/11/26 by Vyacheslav V. Kitaeff, Kitaeff, Vyacheslav V.
Physics and Astronomy · #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #astro-ph.IM

paper · pdf · doi:10.48550/arxiv.1411.7088

Presented at ADASS'14 conference. 4 pages, 4 figures

arxiv created 2014/12/06 · arxiv updated 2014/12/09

Abstract

The Murchison Widefield Array (MWA) is a new low frequency radio telescope operating on the Square Kilometre Array site in Western Australia. MWA is generating tens of terabytes of data daily. The size of the required data storage has become a significant operational limitation and cost. We present a simple binary compression technique and a system for the floating point visibility data developed MWA. We present the statistics of the impact of such compression on the data with the typical compression ratio up to 1:3.1.

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