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## Overview of RASFX: IAA RAS VLBI Software Correlator

Труды ИПА РАН, вып. 55, 41–44 (2020)

Ключевые слова: RASFX, correlator, data processing, group delay, HPC

### Аннотация

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.

### Цитирование

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V. O. Ken. Overview of RASFX: IAA RAS VLBI Software Correlator // Труды ИПА РАН. — 2020. — Вып. 55. — С. 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 = {Труды ИПА РАН}, keyword = {RASFX, correlator, data processing, group delay, HPC}, pages = {41--44}, title = {Overview of RASFX: IAA RAS VLBI Software Correlator}, url = {http://iaaras.ru/library/paper/2076/}, year = {2020} } TY - JOUR TI - Overview of RASFX: IAA RAS VLBI Software Correlator AU - Ken, V. O. PY - 2020 T2 - Труды ИПА РАН 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/library/paper/2076/ ER -