Local area networking in a radio quiet environment

Edwin L. Childers; Gareth Hunt; Joseph J. Brandt

doi:10.1117/12.459503

27 November 2002 Local area networking in a radio quiet environment

Edwin L. Childers, Gareth Hunt, Joseph J. Brandt

Proceedings Volume 4845, Advanced Global Communications Technologies for Astronomy II; (2002) https://doi.org/10.1117/12.459503
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The Green Bank facility of the National Radio Astronomy Observatory is spread out over 2,700 acres in the Allegheny Mountains of West Virginia. Good communication has always been needed between the radio telescopes and the control buildings. The National Radio Quiet Zone helps protect the Green Bank site from radio transmissions that interfere with the astronomical signals. Due to stringent Radio Frequency Interference (RFI) requirements, a fiber optic communication system was used for Ethernet transmissions on the site and coaxial cable within the buildings. With the need for higher speed communications, the entire network has been upgraded to use optical fiber with modern Ethernet switches. As with most modern equipment, the implementation of the control of the newly deployed Green Bank Telescope (GBT) depends heavily on TCP/IP. In order to protect the GBT from the commodity Internet, the GBT uses a non-routable network. Communication between the control building Local Area Network (LAN) and the GBT is implemented using a Virtual LAN (VLAN). This configuration will be extended to achieve isolation between trusted local user systems, the GBT, and other Internet users. Legitimate access to the site, for example by remote observers, is likely to be implemented using a virtual private network (VPN).

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Edwin L. Childers, Gareth Hunt, and Joseph J. Brandt "Local area networking in a radio quiet environment", Proc. SPIE 4845, Advanced Global Communications Technologies for Astronomy II, (27 November 2002); https://doi.org/10.1117/12.459503

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KEYWORDS

Switches

Computing systems

Telescopes

Electromagnetic coupling

Local area networks

Buildings

Radio astronomy

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