LIGO Frame-to-Stream conversion
frame file represents a "snapshot" of data across multiple sensors. For example, the frame
will contain one hour's worth (3600 s) of minute-trend data from all
sensors at the Hanford site: all stations (LVEA
, ...), all accelerometers (X
), all DMT frequency bands (1HZ3
, ...), and so on.
Each frame file must be "disassembled" into its various sources so that data from each source can be added onto the end of the stream file it corresponds to. This is what the program
runs nightly after all frame files have been received.
30 0 * * * /usr/local/ligotools/i2u2tools/bin/ImportData /disks/i2u2/ligo/data/frames/trend_after23April2013 /usr/local/ligotools/ligotools /disks/i2u2/ligo/data/streams
runs the script i2u2-data
This shell script is, in its entirety,
java -cp /usr/local/ligotools/i2u2tools/java gov.fnal.elab.ligo.data.convert.ImportData "$@"
a call to the java program
-- Main.JoelG - 2017-02-07