Internet quality of service between the UK and La Palma in 1998 and 1999

Details Internet quality of service between the UK and La Palma in 1998 and 1999 Internet quality of service between the UK and La Palma in 1998 and 1999

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4011...23m&link_type=abstract

Proc. SPIE Vol. 4011, p. 23-32, Advanced Global Communications Technologies for Astronomy, Robert I. Kibrick; Anders Wallander;

Astronomy and Astrophysics

Astronomy

1

Scientific paper

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.

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