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Overview of RASFX: IAA RAS VLBI Software Correlator

Transactions of IAA RAS, issue 55, 41–44 (2020)

Keywords: RASFX, correlator, data processing, group delay, HPC

Abstract

The paper describes the implementation of the RASFX correlator based on Graphical Processing Unit (GPU). The main principles, hardware and software solutions for the quasi-real time VLBI data processing with up to 96 Gb/s data rate are described. RASFX is developed for geodetic VLBI observations processing and supported by IAA RAS. The RASFX software is designed to run on GPU-based High Performance Computing (HPC) cluster. At present, the RASFX correlator is mainly used to process local 1-hour broadband S/X sessions; approximately 8000 sessions have been processed. The paper presents a comparison of group delays from the RASFX correlator with group delays obtained from the DiFX correlator output using PIMA software. RASFX is also used in the laboratory and VLBI tests of receiving and recording equipment.

Citation

Text

BibTeX

RIS

V. O. Ken. Overview of RASFX: IAA RAS VLBI Software Correlator // Transactions of IAA RAS. — 2020. — Issue 55. — P. 41–44.

@article{ken2020,
  abstract = {The paper describes the implementation of the RASFX correlator based on Graphical Processing Unit (GPU). The main principles, hardware and software solutions for the quasi-real time VLBI data processing with up to 96 Gb/s data rate are described. RASFX is developed for geodetic VLBI observations processing and supported by IAA RAS. The RASFX software is designed to run on GPU-based High Performance Computing (HPC) cluster. At present, the RASFX correlator is mainly used to process local 1-hour broadband S/X sessions; approximately 8000 sessions have been processed. The paper presents a comparison of group delays from the RASFX correlator with group delays obtained from the DiFX correlator output using PIMA software. RASFX is also used in the laboratory and VLBI tests of receiving and recording equipment.},
  author = {V.~O. Ken},
  doi = {10.32876/ApplAstron.55.41-44},
  issue = {55},
  journal = {Transactions of IAA RAS},
  keyword = {RASFX, correlator, data processing, group delay, HPC},
  pages = {41--44},
  title = {Overview of RASFX: IAA RAS VLBI Software Correlator},
  url = {http://iaaras.ru/en/library/paper/2076/},
  year = {2020}
}

TY  - JOUR
TI  - Overview of RASFX: IAA RAS VLBI Software Correlator
AU  - Ken, V. O.
PY  - 2020
T2  - Transactions of IAA RAS
IS  - 55
SP  - 41
AB  - The paper describes the implementation of the RASFX correlator based
on Graphical Processing Unit (GPU). The main principles, hardware and
software solutions for the quasi-real time VLBI data processing with
up to 96 Gb/s data rate are described. RASFX is developed for
geodetic VLBI observations processing and supported by IAA RAS. The
RASFX software is designed to run on GPU-based High Performance
Computing (HPC) cluster. At present, the RASFX correlator is mainly
used to process local 1-hour broadband S/X sessions; approximately
8000 sessions have been processed. The paper presents a comparison of
group delays from the RASFX correlator with group delays obtained
from the DiFX correlator output using PIMA software. RASFX is also
used in the laboratory and VLBI tests of receiving and recording
equipment.
DO  - 10.32876/ApplAstron.55.41-44
UR  - http://iaaras.ru/en/library/paper/2076/
ER  -