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Hydrophone Data Acquisition and Diversion Mode
Hydrophone Data Acquisition and Diversion Mode

Format

Hydrophone data is available in WAV and MP3 audio files. For normal hydrophones, WAV files are the base data type, for hydrophone arrays, HYD files are the base data type. MP3s are generated from WAV files and are stored in the archive or may be generated on the fly.

For WAV format data, the files will be accompanied by a calibration file (except for FileDownloadService requests). This file is a text file, comma delimited with one descriptive header row. It is named following the usual standard and ending with '-hydrophoneCalibration.txt'. The dateFrom / dateTo is taken from the calibration date range of the first sensitivity bin attribute. If a search extends over multiple calibrations, multiple files will be produced. A currently applicable calibration will produce a file named with a dateTo that is midnight tomorrow. Here is an example of the first few lines of a hydrophone calibration text file:

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