Kistler Accelerometer Data

Processed data products for Kistler Accelerometers are described here. For Kistler Accelerometer raw binary files acquired directly from the instrument, see here. Kistler processed data products are produced from each raw file, which normally contain 5 minutes of data. Processed products are available in three formats. The MAT file contains the raw, uncalibrated data parsed into MATLAB-readable format, while the PNG/PDF plot products are spectrograms of the acceleration along the X, Y, Z instrument axes. The calibration documentation (Kistler_CalSheet_2013.pdf) will be bundled with all data product requests; this data is used to calibrate the spectrograms only. Contact us for more information. Also, see the manufacturer's website: http://www.kistler.com/ca/en/products/components/acceleration-sensors/.

Oceans 3.0 API filter: dataProductCode=KAD

Revision History:

• 20150805: Data product migrated from VENUS data download

Formats

MAT file Raw Data

MAT files contain the raw uncalibrated data. The data is contained in the KisterData structure, accompanied by the usual metadata structure. The structures and fields are described below.

KistlerData: a structure containing the following raw data fields:

• matlabtime: vector of time stamps for each measurement in matlab datenum format: days since January 1, 0000. 
• numChannels: number of sensors, should always be 4 (X,Y,Z uncalibrated acceleration and temperature).
• sampleRateHz: sample rate in Hz, usually 2560 Hz. 
• waterproperty: cell array with names of the measured quantities
• Temperature / xAxisVolts / yAxisVolts / zAxisVolts: sensor data arrays, all are not calibrated (same length as matlabtime). 
• Temperature_QCflag / xAxisVolts_QCflag / yAxisVolts_QCflag / zAxisVolts_QCflag: sensor data QAQC flag arrays, currently, these are all 0s (same length as matlabtime). See the QAQC pages for more information. 
• Temperature_units / xAxisVolts_units / yAxisVolts_units / zAxisVolts_units: string containing the measurement unit, since the data is not calibrated, this is always 'V' for Volts. 

Oceans 3.0 API filter: extension=mat

PNG/PDF Spectrogram

Spectrograms of relative acceleration along the X,Y,Z instrument axes are provided in PNG/PDF format. As previously noted, the spectrogram is calibrated as per the calibration sheet. The calibration applies the bias voltage offset and the frequency dependent sensitivity, which converts millivolts to 1 g. The PDF format contains multiple spectrograms on multiple pages, while the PNG products will be separate files for each 5 minute spectrogram. Here is an example spectrogram:

Oceans 3.0 API filter: extension={png,pdf}

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