P-wave velocity, caliper system (PWAVE-C-DISC) 

P-wave velocity data were measured on discrete cube and cylinder samples (x, y, or z-axis) using pairs of piezoelectric transducers mounted on a caliper system. Report includes P-wave velocity in x, y, and/or z-direction, caliper separation, traveltime between transducers, and first arrival picks.

Data File format

    Exp: expedition number
    Site: site number
    Hole: hole number
    Core: core number
    Type: type indicates the coring tool used to recover the core (typical types are F, H, R, X).
    Sect: section number
    A/W: archive (A) or working (W) section half.
    Offset on section (cm): position of the sample being measured relative to the top of a section or section half.
    Offset (cm): position of observation made on a sample (e.g. cubes) measured relative to the top of the sample.
    Top depth CSF-A (m): location of the observation expressed relative to the top of a hole.
    Bottom depth CSF-A (m): location of the lower edge of the observation expressed relative to the top of the hole.
    Top depth [other] (m): location of the observation expressed relative to the top of a hole. The location is presented in a scale selected by the science party or the report user.
    Bot depth [other] (m): location of the lower edge of the observation expressed relative to the top of a hole. The location is presented in a scale selected by the science party or the report user.
    P-wave velocity x (m/s): velocity of pressure wave through sample in the x axis (computer pick).
    P-wave velocity y (m/s): velocity of pressure wave through sample in the y axis (computer pick).
    P-wave velocity z (m/s): velocity of pressure wave through sample in the z axis (computer pick).
    P-wave velocity (unknown axis) (m/s): velocity of pressure wave through sample where the axis is unknown (computer pick).
    Caliper separation (mm): distance between the transducers on the caliper.
    Sonic traveltime (µs): manually picked traveltime of the sonic wave from transducer to transducer through the sample.
    P-wave velocity x [manual] (m/s): velocity of P-wave through sample in the x axis, calculated using the manually picked traveltime.
    P-wave velocity y [manual] (m/s): velocity of P-wave through sample in the y axis, calculated using the manually picked traveltime.
    P-wave velocity z [manual] (m/s): velocity of P-wave through sample in the z axis, calculated using the manually picked traveltime.
    P-wave velocity (unknown axis) [manual] (m/s): velocity of pressure wave through sample when the axis is unclear, calculated using the manually picked traveltime.
    Sonic traveltime [manual] (µs): manually picked traveltime of the sonic wave from transducer to transducer through the sample.
    Transducer signal filename: file containing the raw P-wave signal.
    Configuration filename: P-wave caliper instrument configuration file.
    Aux file filename: File containing calibration parameters and calibration velocity measurements.
    Run filename: Filename of the raw p-wave data file containing a given set of measurements.
    Timestamp (UTC): date and time the observation was made.
    Instrument: abbreviation or mnemonic for the P-wave sensing device used to make this observation.
    Instrument group: abbreviation or mnemonic for the data collection device used to acquire this observation.
    Text ID: automatically generated unique database identifier for a sample, visible on printed labels.
    Test No: unique number associated with the instrument measurement steps that produced these data. 
    Sample comments: observations recorded about the sample itself.
    Test comments: observations about a measurement or the measurement process; some measurement observations may be under Result comments.
    Result comments: observations about a measurement or the measurement process; some measurement observations may be under Test comments.