Dr
Daniel Mitchell
(Harvard-Smithsonian Center for Astrophysics)
27/07/2011, 08:00
I will discuss a strategy for adapting the CUDA-based, real-time, MWA calibration and imaging approach for use in an off-line iterative deconvolution system (codenamed CUWARP).
This approach is attractive for compact, low frequency arrays, since the image re-sampling required to deal with time-dependent ionospheric distortions is also used to correct for the wide-field w-term effects.
The...
Dr
John Romein
(Stichting ASTRON)
27/07/2011, 08:40
In this talk, I will report on a novel way to implement W-projection gridding on GPUs.
This method is several times faster than existing GPU gridders, because it needs significantly fewer accesses to the relatively slow GPU memory.
I will show how gridding on an eight-GPU system is typically 250 times faster than on a regular dual-CPU server, and over 20 times more energy-efficient.
The...
Mr
Vamsi Krishna Veligatla
(Kapteyn Institute (University Of Groningen))
27/07/2011, 09:50
Techniques like the Minimum Variance Distortionless Response (MVDR) beamformer enable us to minimize the undesired power entering a sensor array via its sidelobes, but have been deemed computationally expensive to use.
We present the results of an implementation of the MVDR algorithm on the GPUS as well as the modifications we made to the classic MVDR algorithm to work with interferometric data.
Dr
Panos Labropoulos
(ASTRON & Kapteyn Institute)
27/07/2011, 10:30
During this talk, I will present the progress and current status of LOFAR Epoch of Reionization experiment data reduction pipeline.
I will discuss the techniques and algorithms used and show some early results of deep observations for the time being for LOFAR.
The image quality, however, is still not perfect and significant improvements can be expected in the months ahead using improved...
