You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 6 Next »

BioSonics Time Series

Data products for BioSonics Echosounders are described here.

Revision History

  • 2011XXXX: Initial data products released in manufacturer DT4 and MATLab mat formats.

Formats

This data is available in DT4 and MAT formats. Content descriptions and example files are provided below.

To produce the file, the following requirements apply:

  • A new file is started at the beginning of each day, or when the driver is restarted (this should account for configuration changes, site changes, etc).
  • The instrument date/time field is replaced using the NEPTUNE timestamp at the beginning of the log file (since this timestamp is more accurate than the instrument clock).
DT4

This format is specific to the manufacturer. When using BioSonics data acquisition software, data is normally stored in this way. Although we use custom-built drivers to communicate with our instruments, we can use the raw data in the log file to produce the DT4 file which can be interpreted by BioSonics post-processing software, and commercial software like EchoView.

This format is further described in the manufacturer's documentation.

Example:

MAT

MAT files (v7) can be opened using MathWorks MATLAB 7.0 or later. The file contains the following structures: .....

meta: structure containing the following metadata fields.

  • deviceID: A unique identifier to represent the instrument within the NEPTUNE Canada network.
  • creationDate:Date and time (using ISO8601 format) that the data product was produced. This is a valuable indicator for comparing to other revisions of the same data product.
  • deviceHeading: Obtained at time of deployment.
  • siteName: Name corresponding to its latitude, longitude, depth position.
  • deviceName: A name given to the instrument.
  • deviceCode: A unique string for the instrument which is used to generate data product filenames.
  • locationName: The node of the NEPTUNE Canada observatory. Each location contains many sites.
  • samplingPeriod: Sampling rate of the instrument in seconds.
  • depth: Obtained at time of deployment.
  • lat: Obtained at time of deployment.
  • lon: Obtained at time of deployment.

data: structure containing the BioSonics data, having the following fields.
*

units: structure containing unit of measure for fields in structures above. For instance, units.lat='degrees N'.

Example:

Discussion

To comment on this product, click _Add Comment_ below.

  • No labels