Raw variables derived from Sound Metrics data files

DIDSON imaging sonar data files (.ddf)

Echoview can derive the following raw variables from DIDSON .ddf data files.

  • Sv dB frames

  • unspecified dB frames

  • position GPS fixes

  • pitch data

  • roll data

  • heading data

The unspecified dB frames variable contains signal intensities from 0 to 90 dB as stored in the DIDSON data file. The Sv frames variable contains Sv data derived for these intensities as described in Multibeam Magnitudes to Sv. You must enter calibration settings for the Sv frames variable before using this variable for quantitative analyses.

ARIS imaging sonar data files (.aris)

Echoview can derive the following raw variables from ARIS .aris data files.

  • Sv frames
  • unspecified dB frames
  • heading data
  • roll data
  • pitch data

See also

Sound Metrics data files
Calibrating Sound Metrics DIDSON data

Calibrating Sound Metrics ARIS data