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.
Full text not available from this repository. (Use alternate locations listed below)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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