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

被引：2

作者：

Abidin, Z. Z. ^{[1
]}

Hashim, S. J. ^{[2
]}

Wei, L. Y. ^{[2
]}

Zhong, C. ^{[3
]}

Rosli, Z. ^{[1
]}

机构：

[1] Univ Malaya, Fac Sci, Dept Phys, Kuala Lumpur 50603, Malaysia

[2] Univ Putra Malaysia, Comp & Commun Syst Engn Dept, Serdang 43400, Selangor, Malaysia

[3] Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China

来源：

INDIAN JOURNAL OF PHYSICS | 2018年 / 92卷 / 01期

关键词：

e-VLBI; Radio astronomy instrumentation; Network performance; Data transfer protocol;

D O I：

10.1007/s12648-017-1080-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：1 / 6

页数：6