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For echosounder data products only. Currently used by the ASL Acoustic Profiler Time Series data products.

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Ensemble Period

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The default value is to apply calibration and calculate the Volume Backscatter when available. The alternative Users may also choose a Target Strength calculation for calibrated data The former is used to estimate bio-mass of schools or aggregations, with the latter is useful with single large targets such as predatory fish (for more information see the format descriptions). The uncalibrated option will provide the raw data only. Raw data has units of raw counts, which are proportional to the received acoustic pressure.

• Calibrated - Volume Backscatter Sv (if available)

  Oceans 2.0 API filter: dpo_calibration=1

• Calibrated - Target Strength TS (if available)

  Oceans 2.0 API filter: dpo_calibration=1

• Uncalibrated (raw data)

  Oceans 2.0 API filter: dpo_calibration=0

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File-name mode field

No affect on file-name.

Echosounder Noise Suppression

This option only applies to the ASL Zooplankton Acoustic Profiler (ZAP) echosounder. An ONC-customized noise suppression algorithm is applied to the ZAP data by default, this option allows the user to switch it off and reproduce ASL's standard processing of the data.

• On

  Oceans 2.0 API filter: dpo_zapNoiseSuppression=1

• Off

  Oceans 2.0 API filter: dpo_zapNoiseSuppression=0