Calibration settings for Sonic data

This page describes the settings, necessary to an Echoview calculation, on the Calibration page of the Variable Properties dialog box for acoustic variables derived from Sonic data files.

We recommend you assess the suitability of the settings available on the Calibration pages for each acoustic variable. Some settings will be used to calculate data point values or ranges, others may be used during analysis or display of the data. The table below shows which settings are used for calculating data point values and ranges, which are used for other calculations and which settings may not be used by the 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.

Changes in calibration settings used for range calculations may shift ping data in the depth dimension but will not automatically adjust the position of regions and lines. You should review any existing regions and lines to ensure they are still valid. For more information refer to Range calculation effects on regions and lines.

Notes:

Table legend

Y

Setting is used in calculating data point values or ranges as indicated by the column heading.

 

Setting is not used in calculating data point values (when green background) or ranges (when blue background) but may be used for other purposes, see Additional uses of Calibration settings

 

Setting is not available for this variable

 

Calibration settings for variables from Sonic KFC-3000, KFC-2000, KFC-1000, KFC-500 series and Sonic KFS echosounder

When data are logged with Sonic echosounders, a separate file called a parameter file is generated to correspond with each data file. The settings from the parameter file (or other settings that are correct for the data) must be determined and entered into Echoview.

Note: Sonic parameter files contain constants for only two of the four data sets that are stored in a data file for the KFC series. These four data sets are referred to as sig1 transceiver (narrow and wide) and sig2 transceiver (narrow and wide). The data may be from 38, 70, 120, or 200 kHz transceivers and you must identify them manually as this information is not stored in the underlying data files.

The following settings are available for Sonic raw variables:

Setting

Data point values

Range

Sv pings

angular position pings

All acoustic variables

Calibration page of Variable Properties dialog box

AbsorptionCoefficient

Y

 

 

SoundSpeed

Y

 

Y

TransmittedPulseLength

Y

 

 

KaijoTRFactor

Y

 

 

TwoWayBeamAngle

Y

 

 

Frequency

 

 

 

TvgRangeCorrection

     

From data file

Number of data points

 

 

Y

Use Help > Sonar Calculator to use the Sonar calculator to calculate sound speed and absorption coefficient.

Calibration settings for variables from Sonic KFC-6000/KSE-300 echosounder

The following settings are available for Sonic single beam variables:

Setting

Data point values

Range

Power dB single beam pings

Sv single beam pings

TS single beam pings

All acoustic variables

Calibration page of Variable Properties dialog box

AbsorptionCoefficient

 

Y

Y

 

CalibrationOffsetSv

       

CalibrationOffsetTs

       

Frequency

       

MajorAxis3dbBeamAngle

       

SoundSpeed

 

Y

 

 

TRFactor

Y

Y

Y

 

TransmittedPulseLength

 

Y

 

 

TvgRangeCorrection

     

 

TwoWayBeamAngle

 

Y

 

 

From data file

Number of data points

     

 

The following settings are available for Sonic split beam variables:

Setting

Data point values

Range

Power dB split beam pings

Sv split beam pings

TS split beam pings

angular position split beam pings

All acoustic variables

Calibration page of Variable Properties dialog box

AbsorptionCoefficient

 

Y

Y

   

CalibrationOffsetSv

         

CalibrationOffsetTs

         

Frequency

 

       

MajorAxis3dbBeamAngle

 

       

SonicArrayCenterDistance

 

 

 

   

SonicTransducerRadiusCoefficient

 

 

 

Y*

 

TRFactor

Y

Y

Y

   

SoundSpeed

         

TransmittedPulseLength

 

Y

 

   

TvgRangeCorrection

   

 

   

TwoWayBeamAngle

 

Y

 

   

From data file

Number of data points

   

 

   

*Used by the Sonic beam compensation model under a single target detection split-beam (virtual) variable.

See also

About calibration settings
Entering calibration settings

Sonic data files

Raw variables derived from Sonic data
Sonic data to Sv and angular position