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## VGOS Software Correlator Implemented on Hybrid Blade Server Cluster

Transactions of IAA RAS, issue 33, 64–71 (2015)

Keywords: VLBI, VGOS, correlator, data processing, high-perfomance computing cluster, graphical processing unit

### Abstract

The VGOS software correlator was designed in the IAA RAS. The correlator is able to process data at maximum rate of 16 Gb/s from each station and up to 6 stations simultaneously. The main idea of the new FX correlator design is the usage of Graphical Processing Units (GPUs) for Fourier transformation, spectra multiplication, bits repacking, fringe stopping and pcal extraction. The correlator hardware is based on hybrid blade server cluster. At present the correlator hardware is assembled, the software is on the final stage of development. In order to test the six-station correlator in near-realtime mode, an experiment was carried out with following setup: 4 frequency channels each of 512 MHz bandwidth for 6 stations input streams at 2 polarizations. In each frequency channel 78 fringes were found.

### Citation

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BibTeX
RIS
I. F. Surkis, V. F. Zimovsky, V. O. Ken, Y. L. Kurdubova, V. Y. Mishin, N. A. Mishina, V. A. Shantyr. VGOS Software Correlator Implemented on Hybrid Blade Server Cluster // Transactions of IAA RAS. — 2015. — Issue 33. — P. 64–71. @article{surkis2015, abstract = {The VGOS software correlator was designed in the IAA RAS. The correlator is able to process data at maximum rate of 16 Gb/s from each station and up to 6 stations simultaneously. The main idea of the new FX correlator design is the usage of Graphical Processing Units (GPUs) for Fourier transformation, spectra multiplication, bits repacking, fringe stopping and pcal extraction. The correlator hardware is based on hybrid blade server cluster. At present the correlator hardware is assembled, the software is on the final stage of development. In order to test the six-station correlator in near-realtime mode, an experiment was carried out with following setup: 4 frequency channels each of 512 MHz bandwidth for 6 stations input streams at 2 polarizations. In each frequency channel 78 fringes were found.}, author = {I.~F. Surkis and V.~F. Zimovsky and V.~O. Ken and Y.~L. Kurdubova and V.~Y. Mishin and N.~A. Mishina and V.~A. Shantyr}, issue = {33}, journal = {Transactions of IAA RAS}, keyword = {VLBI, VGOS, correlator, data processing, high-perfomance computing cluster, graphical processing unit}, pages = {64--71}, title = {VGOS Software Correlator Implemented on Hybrid Blade Server Cluster}, url = {http://iaaras.ru/en/library/paper/1050/}, year = {2015} } TY - JOUR TI - VGOS Software Correlator Implemented on Hybrid Blade Server Cluster AU - Surkis, I. F. AU - Zimovsky, V. F. AU - Ken, V. O. AU - Kurdubova, Y. L. AU - Mishin, V. Y. AU - Mishina, N. A. AU - Shantyr, V. A. PY - 2015 T2 - Transactions of IAA RAS IS - 33 SP - 64 AB - The VGOS software correlator was designed in the IAA RAS. The correlator is able to process data at maximum rate of 16 Gb/s from each station and up to 6 stations simultaneously. The main idea of the new FX correlator design is the usage of Graphical Processing Units (GPUs) for Fourier transformation, spectra multiplication, bits repacking, fringe stopping and pcal extraction. The correlator hardware is based on hybrid blade server cluster. At present the correlator hardware is assembled, the software is on the final stage of development. In order to test the six-station correlator in near-realtime mode, an experiment was carried out with following setup: 4 frequency channels each of 512 MHz bandwidth for 6 stations input streams at 2 polarizations. In each frequency channel 78 fringes were found. UR - http://iaaras.ru/en/library/paper/1050/ ER -