Baxter, Richard J. and Marais, Patrick and Kuttel, Michelle (2013) GPU-based Acceleration of Radio Interferometry Point Source Visibility Calculations in the MEQtrees Framework, Astronomical Data Analysis Software and Systems XXII, 5-8 November 2012, Champaign, IL USA, ASP Conference Series, 475.
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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 proceedings |
|---|---|
| Subjects: | Computing methodologies > Computer graphics > Image manipulation > Image processing Applied computing > Physical sciences and engineering |
| Date Deposited: | 28 Oct 2013 |
| Last Modified: | 10 Oct 2019 15:32 |
| URI: | http://pubs.cs.uct.ac.za/id/eprint/897 |
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