Calibration settings for single target virtual variables

Calibration settings, necessary to an Echoview calculation, for virtual variables created using the single target detection operators are listed on this page.

We recommend you assess the suitability of the settings available on the Calibration page for the virtual variable. Quantitative calculation/analysis requires calibrated data which is achieved using correct calibration setting values (rather than default values). An ECS file enables you to modify calibration settings for variables in a fileset and virtual variables in an EV file.

Note: The (red) default values on the Calibration pages are for illustration purposes only and may applicable for the variable. Read About calibration settings for further information.

See Calibration settings for virtual variables for further information about virtual variable calibration.

The table below lists specific settings and how they are used:

Settings that are used to calculate the data point value are indicated with a P.
Settings not used for data point calculation may be used for other calculations.

Some settings may not be available for all variables. We recommend you fill in all settings available on the Calibration pages for each variable.

Setting	Data point value
AbsorptionCoefficient
SoundSpeed	P
PulseDuration	P
TwoWayBeamAngle
CalibrationOffset	P

Additional notes for single target virtual variables:

Transmitted pulse duration and Sound speed are used for the normalization of pulse lengths specified on the Single Target Detection page of the Variable Properties dialog box
Minor and major 3 dB Beam Angle settings on the Calibration page of the Variable Properties dialog box are used in calculating beam compensation for TS corrections and when drawing the beam on the 3D single targets graph.
When using the Single target detection - single beam (method 1) operator or the Single target detection - split beam (method 1) operator with an Sv operand, the Two-way beam angle is used to calculate sample values.
When using the Single target detection - single beam (method 1) operator or the Single target detection - split beam (method 1) operator with a TS operand, the Two-way beam angle is used for analyses.
The single target Thickness source for display purposes can be found under Single target settings on the Data page of the Variable Properties dialog box. Prior to Echoview 5, the setting was a calibration setting.

See Single target detection algorithms for more information.

Calibration settings for single target virtual variables

See also