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Science Mode Discovery

  1.  Segments are detected by a monitor called SegGener. This monitor is described at e.g. http://www.ligo.caltech.edu/~jzweizig/dmt/Monitors/SegGener/SegGener.html SegGener is configured using two text files containing:
    1. A list of segment definitions, including the segment name, segment version number, maximum duration, start condition and (optional) stop condition.
    2. An Operating State Condition (OSC) package configuration file that defines the conditions used to detect Segment start and stop.
  2. The current SegGener configuration and current statistics are reported at LHO  (http://blue.ligo-wa.caltech.edu/gds/dmt/monitor_reports/SegGener/Segment_List.html), and at LLO (http://london.ligo-la.caltech.edu/gds/monitor_reports/SegGener/Segment_List.html)
  3. The segments are written to the database as follows:
    • Segment information is sent to the trigger manager which accumulates trigger- and segment-table rows. The trigger manager periodically writes out ligolw files containing any new process, trigger and segment table rows. In general a file is written if:
      • one or more unwritten trigger rows are >5 minutes old
      • >1000 triggers have been stored
      • One or more segments are available.
    • After writing each file, SeqInsert (part of the ligotools dataflow package) is run to queue the file for submission to LDAS.
    • SeqInsert runs through its queue, submitting putmetadata jobs to insert the files into the database
  4. At present (S1-S3), the following segment types are generated.
    Xn:IFOLocked
    Ifo Xn is in science mode
    Xn:MDCLocked Ifo Xn Mode Cleaner is locked.
    Xn:Injection Ifo Xn is in injection mode
    Xn:Calibration
    Ifo Xn is in Calibration mode
    Xn:IFOCommon
    Ifo Xn is in Common mode running

    The name "Xn:IFOLocked" is used for historical reasons and we plan to rename this condition to "Xn:ScienceMode" for S4.
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