Calibration settings for Echoview Data File Format 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 Echoview Data File Format 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 and which are used for other calculations. The tables also detail the parameters that are read from the data file and used to calculate range values.

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.

Note: Data file values that have been used since the data was loaded or the ECS file was added, saved or removed are displayed in black text. Default values that have been used are displayed in orange text. Data file or ECS values that have been read but not used are displayed in grey text. Read About calibration settings for further information.

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

Single beam Power, Sv, TS and Angular position variables

Settings

Data point values

Data point range

Power dB raw pings

Sv raw pings

TS raw pings

Angular positions raw pings

All acoustic variables

Calibration page of Variable Properties dialog box

AbsorptionCoefficient

 

Y

Y

  

  

CalibrationOffsetSv

 

Y

 

   

CalibrationOffsetTs

 

 

Y

   

Frequency

 

Y

Y

   

MajorAxis3dBBeamAngle

 

 

 

  

 

MinorAxis3dBBeamAngle

 

 

 

  

 

SoundSpeed

 

Y

Y

  

Y

TransmittedPower

 

Y

Y

  

  

TransmittedPulseLength

 

Y

     

TransducerGain

 

Y

Y

  

  

TRFactor

 

Y

Y

  

  

TvgRangeCorrection*

 

 

 

   

TwoWayBeamAngle

 

Y

  

  

  

*TvgRangeCorrection is not read from the data file. Echoview assigns Standard as the TvgRangeCorrection algorithm for Echoview Data File Format files. This will be incorrect for exported Simrad Ex500 data.

See also: Export to Echoview Data File Format - Notes.

Multibeam Sv and Angular position variables

Settings

Data point values

Data point range

Sv multibeam pings

magnitude multibeam pings

All acoustic variables

Calibration page of Variable Properties dialog box

SoundSpeed

 

 

Y

Wideband Sv, TS and Angular position variables, Pulse compressed wideband Sv, TS and Angular position variables

Settings

Data point values for wideband pings

Data point range

Power dB

Power dB pulse compressed

Sv

Sv pulse compressed

TS

TS pulse compressed

Angular positions

Angular positions pulse compressed

All acoustic variables

Calibration page of Variable Properties dialog box

AbsorptionDepth

Y

Y

Y

Y

 

EffectivePulseLength

 

Wideband Sv only

 

 

  

Acidity

Y

Y

Y

Y  

  

MinorAxisAngleOffsetTableWideband

 

 

 

  

 

MajorAxisAngleOffsetTableWideband

 

 

 

 

 

MinorAxisBeamWidthTableWideband

 

 

 

 

 

MajorAxisBeamWidthTableWideband

 

 

 

 

 

Frequency

Y

Y

Y

Y  

 

FrequencyTableWideband

Y

Y

Y

Y  

 

FrequencyEnd

Y

Y

Y

Y

 

FrequencyStart

Y

Y

Y

Y

 

GainTableWideband

Y

Y

Y

 

MajorAxis3dbBeamAngle

 

 

 

 

  

MajorAxisAngleOffset

Y

Y

Y

  

MajorAxisAngleSensitivity

Y

Y

Y

  

MinorAxis3dbBeamAngle

 

 

 

 

 

MinorAxisAngleOffset

Y

Y

Y

Y

 

MinorAxisAngleSensitivity

Y

Y

Y

Y

  

PulseCompressedEffectivePulseLength

 

Pulse compressed wideband Sv only

   

  

  

Salinity

Y

Y

Y   

Y  

  

SamplingFrequency

Y

Y

Y

Y

 

SoundSpeed

Y

Y

Y

Y

Y

Temperature

Y

Y

Y

Y

 

TransducerGain

Y

Y

Y

Y

 

TransmittedPower

Y

Y

Y

Y

 

TransmittedPulseLength

Y

Y

Y

Y

 

TvgRangeCorrection*

Y

Y

Y

Y

 

TwoWayBeamAngle

Y

Y

Y

Y

 

*TvgRangeCorrection is not read from the data file. Echoview assigns Standard as the TvgRangeCorrection algorithm for Echoview Data File Format files.

See also

About calibration settings
Entering calibration settings
About the Echoview Data File Format
Echoview Data File Format files
Raw variables derived from Echoview Data File Format files
Echoview Data File Format equations