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Proceedings Paper

Internet quality of service between the UK and La Palma in 1998 and 1999
Author(s): Paul McNerney; Iain A. Steele
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Paper Abstract

The Liverpool telescope on La Palma will provide live images for planetarium shows in the Liverpool Museum in the UK. Data transfer will be achieved using the Internet. We implemented an automatic program of hourly ftp file transfers from La Palma to the UK throughout 1998 and 1999 to monitor the transfer rates achievable. We find that both the mean and minimum (on 9 out of 10 nights) transfer rates are a function of time of day on weekdays. In addition we find that the minimum transfer rate in early evening has increased from approximately 5 Kbytes/sec in 1998 to approximately 25 Kbytes/sec in 1999. This implies that a compression ratio of around 30:1 must be achieved to allow live display of 2048 X 2048 pixel CCD images in the UK within 10 seconds of the data being taken.

Paper Details

Date Published: 2 June 2000
PDF: 10 pages
Proc. SPIE 4011, Advanced Global Communications Technologies for Astronomy, (2 June 2000); doi: 10.1117/12.387227
Show Author Affiliations
Paul McNerney, Liverpool John Moores Univ. and dB Research Ltd. (United Kingdom)
Iain A. Steele, Liverpool John Moores Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 4011:
Advanced Global Communications Technologies for Astronomy
Robert I. Kibrick; Anders Wallander, Editor(s)

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