GPU-based acceleration of Radio Interferometry point source visibility calculations in the MEQtrees framework

Baxter, Richard and Marais, Patrick and Kuttel, Michelle (2013) GPU-based acceleration of Radio Interferometry point source visibility calculations in the MEQtrees framework, Proceedings of Astronomical Data Analysis Software and Systems - ADASS XXII, November 2012, Chicago, USA, ASP Conference Series, 475, 53-59.

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Abstract

Modern radio interferometer arrays are powerful tools for obtaining high resolution, low frequency images of objects in deep space. An inverse Fourier transform of a model sky-intensity map will produce the corresponding Point Source Visibilities: the raw output of an interferometer. Simulated visibilities can be used to test models of factors affecting the accuracy of observed data, such as radio frequency interference. We describe a GPU/CUDA implementation of the Point Source Visibility calculation module within theMeqTrees software suite. For a large numbers of sources, we achieve an 18× speed-up over the existing CPU module, with the parallel component running up to 120× faster. With modifications to the MeqTrees memory management system to incorporate GPU memory operations, a speed-up of 24× is achievable.

Item Type: Conference paper
Subjects: Computing methodologies > Computer graphics > Image manipulation > Image processing
Computing methodologies > Modeling and simulation
Date Deposited: 28 Oct 2013
Last Modified: 10 Oct 2019 15:32
URI: http://pubs.cs.uct.ac.za/id/eprint/906

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