This plot visualizes the daily data volume, in <b>compressed MBytes</b>, created by VLT and VLTI (plots 1 and 2), by  VISTA (plot 3) and by the VST (plot 4). The
data volume is read from the ngas_files database table. It refers to
compressed files and represents the data volume relevant for transfer.
Since July 2008, VLT/VLTI data are transfered via the internet, before they
were sent on disks. Since March 2012, the EVALSO fibre link serves all Paranal data (including VIRCAM and OMEGACAM)
over the internet.
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Plot 1: The data stream is divided into "ALL" data; "SCIENCE" (all data acquired between mjd.00
... mjd.40), and "CALIBRATION" (all other data). </font><p><font size="2">

Plot 2: The data stream for instruments with burst modes. Peaks almost always
refer to burst mode observations of a single instruments. That instrument can
be identified in this plot.  </font><p><font size="2">

Plots 3,4: As plot 1, the VIRCAM and OMEGACAM data streams are divided into ALL, SCIENCE and
CALIBRATION. </font><p><font size="2"> 

Until 2011, the thin broken line in the history plots marks the data volume equivalent to a 10.0 Mbit/s 
continuous transfer 
(before EVALSO, this was the bandwidth for data transfer of the 
connection Paranal - Antofagasta).