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Radio astronomy interferometer network testing for a Malaysia-China real-time e-VLBI


Zainal Abidin, Zamri and Hashim, Shaiful Jahari and Lim, Yang Wei and Chen, Zhong and Rosli, Zulfazli (2018) Radio astronomy interferometer network testing for a Malaysia-China real-time e-VLBI. Indian Journal of Physics, 92 (1). 1-Jun. ISSN 0019-5480; ESSN: 0974-9845


The uv-coverage of the current VLBI network between Australia northern Asia will be significantly enhanced with an existence of a middle baseline VLBI station located in Malaysia. This paper investigated the connecting route of the first half of the Asia-Oceania VLBI network i.e. from Malaysia to China. The investigation of transmission network characteristics between Malaysia and China was carried out in order to perform a real-time and reliable data transfer within the e-VLBI network for future eVLBI observations. MyREN (Malaysia) and CSTNET (China) high-speed research networks were utilized for this proposed e-VLBI connection. Preliminary network test was performed by ping, traceroute, and iperf prior to data transfer tests, which were evaluated with three types of protocols namely FTP, Tsunami-UDT and UDT. The results showed that, on average, there were eighteen hops between Malaysia and China networks with 98 ms round trip time (RTT) delay. Overall UDP protocol has a better throughput compared to TCP protocol. UDP can reach a maximum rate of 90 Mbps with 0% packet loss. In this feasibility test, the VLBI test data was successfully transferred between Malaysia and China by utilizing the three types of data transfer protocols.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1007/s12648-017-1080-5
Publisher: Springer Verlag
Keywords: e-VLBI; Radio astronomy instrumentation; Network performance; Data transfer protocol
Depositing User: Nida Hidayati Ghazali
Date Deposited: 12 May 2020 15:58
Last Modified: 12 May 2020 15:58
Altmetrics: https://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s12648-017-1080-5
URI: http://psasir.upm.edu.my/id/eprint/73703
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