Guralp Systems CD1.1 - Manual (Page 49)

Operator's Guide
The detail screen displays a table, where the first column
shows the time-stamp for each subframe processed and the
second column gives the number of channels processed for
that time-stamp. If a gap has been detected, this is clearly
indicated, in red, in the first column. Subsequent columns are
labelled with CD1.1 channel names and are populated either
with the word “missing”, if no subframe was received for the
given channel with the given time-stamp, or with a quadrant
status indicator, as shown in the following diagram. Each
quadrant of the circle is labelled with a mnemonic identifier
and will be either red or green, depending on the status of the
associated subsystem. Green is used to indicate a satisfactory
status and red indicates some cause for concern.
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