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## The Software Correlator for VGOS VLBI network Data Processing: First Commissioning Tests

Transactions of IAA RAS, issue 36, 83–89 (2016)

Keywords: VGOS, Software Correlator, Quasar VLBI network, commissioning

### Abstract

The first Russian software correlator for a new VGOS VLBI network was developed and tested in 2014. The correlator was designed to be capable of near-real time processing wideband VLBI observations from 6 stations, 4 frequency channels and 2 polarizations each. The RAS software correlator is based on the FX algorithm and implemented on a hybrid blade-server HPC cluster which contains Tesla K20 GPUs in addition to regular CPUs on each server blade. GPUs are used for the most time-consuming operations. The correlator was tested using simulated and real VLBI data. The tests with a maximal data rate were a success. The new correlator was used to process the VLBI data (UT1UTC determined) received from the new 13-meter telescopes of the VLBI network «Quasar».

### Citation

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BibTeX
RIS
I. Surkis, V. Zimovsky, V. Ken, Y. Kurdubova, V. Mishin, N. Mishina, Shantyr V. The Software Correlator for VGOS VLBI network Data Processing: First Commissioning Tests // Transactions of IAA RAS. — 2016. — Issue 36. — P. 83–89. @article{surkis2016, abstract = {The first Russian software correlator for a new VGOS VLBI network was developed and tested in 2014. The correlator was designed to be capable of near-real time processing wideband VLBI observations from 6 stations, 4 frequency channels and 2 polarizations each. The RAS software correlator is based on the FX algorithm and implemented on a hybrid blade-server HPC cluster which contains Tesla K20 GPUs in addition to regular CPUs on each server blade. GPUs are used for the most time-consuming operations. The correlator was tested using simulated and real VLBI data. The tests with a maximal data rate were a success. The new correlator was used to process the VLBI data (UT1UTC determined) received from the new 13-meter telescopes of the VLBI network «Quasar».}, author = {I. Surkis and V. Zimovsky and V. Ken and Y. Kurdubova and V. Mishin and N. Mishina and ShantyrV}, issue = {36}, journal = {Transactions of IAA RAS}, keyword = {VGOS, Software Correlator, Quasar VLBI network, commissioning}, pages = {83--89}, title = {The Software Correlator for VGOS VLBI network Data Processing: First Commissioning Tests}, url = {http://iaaras.ru/en/library/paper/1084/}, year = {2016} } TY - JOUR TI - The Software Correlator for VGOS VLBI network Data Processing: First Commissioning Tests AU - Surkis, I. AU - Zimovsky, V. AU - Ken, V. AU - Kurdubova, Y. AU - Mishin, V. AU - Mishina, N. AU - ShantyrV, PY - 2016 T2 - Transactions of IAA RAS IS - 36 SP - 83 AB - The first Russian software correlator for a new VGOS VLBI network was developed and tested in 2014. The correlator was designed to be capable of near-real time processing wideband VLBI observations from 6 stations, 4 frequency channels and 2 polarizations each. The RAS software correlator is based on the FX algorithm and implemented on a hybrid blade-server HPC cluster which contains Tesla K20 GPUs in addition to regular CPUs on each server blade. GPUs are used for the most time-consuming operations. The correlator was tested using simulated and real VLBI data. The tests with a maximal data rate were a success. The new correlator was used to process the VLBI data (UT1UTC determined) received from the new 13-meter telescopes of the VLBI network «Quasar». UR - http://iaaras.ru/en/library/paper/1084/ ER -