Calibration names used by transducer specific raw variables

Calibration names are used in Calibration sources and ECS files. The following are specific to particular data formats.

Notes:

Used by raw acoustic variables

See also:

Calibration settings for data formats
Common calibration names

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

Calibration setting name

Help file terminology

Default value

Units

MinorAxisAngleOffset

Simrad defines Angle Offset as the offset angle from the acoustical axis. The value is estimated during calibration. If no calibration takes place, the value 0 is used. There may be an Angle Offset for the Major-axis and/or the Minor-axis angles.

See also: Beam angles

Used by:

  • Ek500 Sv and TS raw variables from Power (W telegrams) and B telegrams logged with Ex500
  • Ek500 Sample Sv and TS raw variables (V and P telegrams) logged with Ex60
  • SciFish angular position raw variables
  • Ek60 angular position raw variables
  • ME70 angular position raw variables
  • BioSonics angular position raw variables

0

 degrees

MinorAxisAngleSensitivity

Simrad defines Angle Sensitivity as a parameter that is used in the conversion of the raw angle samples into mechanical degrees for fore-and-aft and athwartship directions. It represents the ratio of electrical degrees to mechanical degrees for the current transducer. This ratio is not used with single beam transducers, and the value is set to 0.

There may be an Angle Sensitivity for the Major-axis and/or the Minor-axis angles.

See also: Beam angles

Used by:

  • Ek500 Sv and TS from Power (W telegrams) and B telegrams logged with Ex500
  • Ek500 Sample Sv and TS variables (V and P telegrams) logged with Ex60
  • SciFish angular position raw variables
  • Ek60 angular position raw variables
  • ME70 angular position raw variables

21.9

 

ApplyCalibrationCorrection

(Apply Simrad) Calibration correction

Default value is ApplyCalibrationCorrection = false.

Used with:

false

 

Ek60TransducerGain

Gain.

The recorded transducer-specific gain that is used in SimradEk60 Power to Sv and TS algorithms.

Instrument Equivalent term from the data file
Simrad Ek60

(Sv or TS) Transducer gain

Used in the Ex60 Power to Sv and TS algorithm. Note that Sa is a separate correction factor in this equation.

This setting corresponds to the Gain setting on the Ex60's Advanced Transceiver dialog box and is defined in the Simrad EK60 Instruction Manual as "The transducer gain presented by calculating the directivity multiplied by the transducer's efficiency."

See also: Transducer gain

SciFish (Sv or TS) Transducer gain, as for Simrad Ek60.
Simrad ME70 (Sv or TS) Transducer gain, as for Simrad Ek60.

26.5

dB

MajorAxisAngleOffset

Simrad defines Angle Offset as the offset angle from the acoustical axis. The value is estimated during calibration. If no calibration takes place, the value 0 is used. There may be an Angle Offset for the Major-axis and/or the Minor-axis angles.

See also: Beam angles

Used by:

  • Ek500 Sv and TS raw variables from Power (W telegrams) and B telegrams logged with Ex500
  • Ek500 Sample Sv and TS raw variables (V and P telegrams) logged with Ex60
  • SciFish angular position raw variables
  • Ek60 angular position raw variables
  • ME70 angular position raw variables
  • BioSonics angular position raw variables

0

 degrees

MajorAxisAngleSensitivity

Simrad defines Angle Sensitivity as a parameter that is used in the conversion of the raw angle samples into mechanical degrees for fore-and-aft and athwartship directions. It represents the ratio of electrical degrees to mechanical degrees for the current transducer. This ratio is not used with single beam transducers, and the value is set to 0.

There may be an Angle Sensitivity for the Major-axis and/or the Minor-axis angles.

See also: Beam angles

Used by:

  • Ek500 Sv and TS from Power (W telegrams) and B telegrams logged with Ex500
  • Ek500 Sample Sv and TS variables (V and P telegrams) logged with Ex60
  • SciFish angular position raw variables
  • Ek60 angular position raw variables
  • ME70 angular position raw variables

21.9

 

SimradBandwidth

Bandwidth

As pertaining to Ex500 echosounders and used in the Ek500 Power to Sv or TS calculation.

Unknown

Unknown
Narrow
Wide
Auto

EcholistenerEchosounderConstant

Used explicitly by EchoListener data files.

300

None

EK60SaCorrection

Sa correction

Sa correction is determined during the calibration process of Ex60 echosounders. The value represents the correction required to the Sv constant to harmonize the TS and Sa (NASC) measurements. Sa corrections are only determined during a calibration, otherwise they are zero.

0

 dB

SamplingFrequency

Sampling frequency

The Sampling frequency, together with the SoundSpeed and TransmittedPulseLength, is used to calculate the sample thickness.

 

Kilohertz

SimradSampleResolution

Sample resolution

10

Centimeters

SimradStartSampleRange

Start sample range

0

Meters

TvgRangeCoefficient

TVG range coefficient

20

None

Used by raw variables that can have logging settings

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

See also:

Calibration settings for data formats
Common calibration names

Calibration setting name

Help file terminology

Default value

Units

AbsorptionCoefficientLogging

Logging value for the Absorption coefficient.

0.01

dB per meter

SoundSpeedLogging

Logging value for the Sound speed.

1500

Meters per second

TransmittedPower

Transmitted power

2000

Watts

TransmittedPowerLogging

Logging value for the Transmitted power.

2000

Watts

TwoWayBeamAngleLogging

Logging value for the Two-way beam angle.

-20.6

dB re 1 Steradians

Ek5SvGain

Ek5 Sv gain

Used in EK500 Power to Sv and TS - to calculate the transducer peak gain.

26.5

dB

Ek5TSGain

Ek5 TS gain

Used in EK500 Power to Sv and TS - to calculate the transducer peak gain.

26.5

dB

Ek5SvGainLogging

Logging value for the Ek5SvGain.

26.5

dB

Ek5TSGainLogging

Logging value for the Ek5TSGain.

26.5

dB

TransmittedPulseLengthLogging

Logging value for the Transmitted pulse length.

1

Milliseconds

WavelengthLogging

Logging value for the Wavelength.

0.0394737

Meters

Wavelength

Wavelength

0.0394737

Meters

SimradPulseLength

Simrad Pulse length

Pertaining to the Ex500 echosounder and used in the Ek500 Power to Sv or TS calculation.

Unknown

Unknown
Long
Medium
Short

SimradDraftLogging

Logging value for the Simrad Draft for Simrad Sv and TS variables based on Q telegrams and single target variables based on E telegrams and only when these variables include a logged draft.

We strongly recommend logging data with transducer depth set to 0 and using Echoview's transducer geometry to model the draft.

Note: There may be slight differences in single target or fish track exported analyses when comparing the analyses pre and post Echoview 5.

0

Meters

ASL Environmental Sciences data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

See also:

Calibration settings of ASL Environmental Sciences data
Common calibration names
AZFP Sv and TS

Calibration setting name

Help file terminology

Default value

Units

AzfpDetectionSlope

Value for a read from an associated AZFP .XML or .cfg file if it is present in the data folder.

0.0227

Volt/dB

AzfpEchoLevelMax

Value for ELmax read from an associated AZFP .XML or .cfg file if it is present in the data folder.

128.3

dB

AzfpTransmitVoltage

Value for VTX read from an associated AZFP .XML or .cfg file if it is present in the data folder.

91.9

 

AzfpTransmitVoltageResponse

Value for TVR read from an associated AZFP .XML or .cfg file if it is present in the data folder.

172.3

dB

CalibrationOffsetSv

A setting for an AZFP Sv calibration offset constant.

0

dB

CalibrationOffsetTs

A setting for an AZFP TS calibration offset constant.

0

dB

SoundSpeed

SoundSpeed may be read from an associated AZFP .XML or .cfg file if it is present in the data folder.

1500

meters/second

TwoWayBeamAngle

TwoWayBeamAngle may be read from an associated AZFP .XML or .cfg file if it is present in the data folder.

-20.600000

dB re 1sr

BioSonics data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

See also:

Calibration settings for BioSonics data
Common calibration names

Calibration setting name

Help file terminology

Default value

Units

Dt4PowerSetting

BioSonics power setting

Note: Post-Echoview 3.00 the calibration setting Dt4PowerSetting is used and the Calibration offset setting is set to zero. Pre-Echoview 3.00 the Calibration offset setting was used to represent the BioSonics PS (Power setting) value - Echoview was unable to read the BioSonics PS at that time.

0

dB

CalibrationOffsetSv

A setting for the BioSonics Sv transducer constant that can be used in the BioSonics Sv equation.

0

dB

CalibrationOffsetTs

A setting for the BioSonics TS transducer constant that can be used in the BioSonics TS equation.

0

dB

ReceiveSensitivity

DT4 Receive sensitivity (RS) read from the data file and used in BioSonics DT4 Sv and TS equations. This value can be modified on the Calibration page.

 

dB

SourceLevel

DT4 Source level (SL) read from the data file and used in BioSonics DT4 Sv and TS equations. This value can be modified on the Calibration page.

 

dB

Echoview Data File Format

Calibration setting name

Help file terminology

Default value

Units

CalibrationOffsetSv

An offset value used in the Echoview Data File Format Power to Sv equation.

0

dB

CalibrationOffsetTs

An offset used in the Echoview Data File Format Power to Sv equation.

0

dB

Furuno data format

HTI data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

See also:

Calibration settings for HTI data
Common calibration names

Calibration setting name

Help file terminology

Default value

Units

HtiAequip

Aequip. Used by HTI version 0.0 .INT files (you will need to calculate the value for Aequip).

For other HTI file types Aequip-related calculations are handled by Echoview.

See also HTI integrated data: Notes.

1.00E-06

 

BeamPatternFactor

This is the Beam_Pattern_Factor used in the HTI sample data to Sv, TS and angular position equations.

0.016

dB

ChirpBandwidth

This is the Chirp_Bandwidth used in the HTI sample data to Sv, TS and angular position equations.

0

kHz

MajorAxisAngleRatio

This is the Horizontal ratio used in the HTI sample data to Sv, TS and angular position equations.  -16  

MinorAxisAngleRatio

This is the Vertical ratio used in the HTI sample data to Sv, TS and angular position equations.

 -26  

ReceiverGain20Log

This is the Receiver_Gain_20_Log read from a *.smp file, where settings and data are stored together, and is used as Receiver_Gain in the HTI sample data to Sv, TS and angular position equations.

Where a *.cfg file accompanies a *.smp file, this is the Receiver_Gain read from the *.cfg file and used in the HTI sample data to Sv, TS and angular position equations.

 -6  

ReceiverGain40Log

This is the Receiver_Gain_40_Log read from a *.smp file, where settings and data are stored together, and used as Receiver_Gain in the HTI sample data to Sv, TS and angular position equations.

Where a *.cfg file accompanies a *.smp file, this is the Receiver_Gain read from the *.cfg file and used in the HTI sample data to Sv, TS and angular position equations.

 -6  

SamplingFrequency

Can be read from an HTI .raw file. See also SamplingFrequency (defined).

44.1

kHz

SoundSpeed

SoundSpeed can be read from version 1.06 SMP files. Other HTI data file types may not record SoundSpeed or may record it in associated *.cfg or *.cal files.

1500

m/s

SourceLevel

This is the Source_level_n used in the HTI sample data to Sv, TS and angular position equations.

205.6

dB

ThroughSystemGain20Log

This is the Log_20 Through System Gain used in the HTI sample data to Sv, TS and angular position equations.

-151

 

ThroughSystemGain40Log

This is the Log_40 Through System Gain used in the HTI sample data to Sv, TS and angular position equations.

-171

 

TvgCrossover20Log

This is the Tvg_Crossover used in the HTI sample data to Sv, TS and angular position equations.

-11.2

 

TvgGain20Log

This is read from a *.smp file, where settings and data are stored together, and used as Tvg_Gain in the HTI sample data to Sv, TS and angular position equations.

Where a *.cfg file accompanies a *.smp file, this is the Tvg_Gain read from the *.cfg file and used in the HTI sample data to Sv, TS and angular position equations.

20.98

dB

TvgGain40Log

This is read from a *.smp file, where settings and data are stored together, and used as Tvg_Gain in the HTI sample data to Sv, TS and angular position equations.

Where a *.cfg file accompanies a *.smp file, this is the Tvg_Gain read from the *.cfg file and used in the HTI sample data to Sv, TS and angular position equations.

20.98

dB

Notes:

Sonic data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information.

See also:

Calibration settings for Sonic data
Common calibration names

Calibration setting name

Help file terminology

Default value

Units

CalibrationOffsetSv

A setting that can offset the Sv value. It may be useful when you need to adjust the Sv value for calibration sphere procedures or for Sv to TS conversions.

0

dB

CalibrationOffsetTs

A setting that can offset the TS value. It may be useful when you need to adjust the TS value for calibration sphere procedures or for TS to Sv conversions.

0

dB

KaijoTRFactor

T/R factor

62.8

None

SonicTransducerRadiusCoefficient

Sonic KFC-6000/KSE-300 coefficient used with Sonic split-beam beam compensation. The coefficient is a function of the transducer radius and wavelength.

3.5

 

SonicArrayCenterDistance

Sonic KFC-6000/KSE-300 coefficient for the distance between array centers. It is used in the calculation of Sonic KFC-6000/KSE-300 angles.

2.0

 

TRFactor

Sonic KFC-6000/KSE-300 T/R factor.

62.8

None

PAS HARP data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

See also:

Precision Acoustics Systems data files
Calibration settings for PAS data
Common calibration names

These calibration settings are used in equations outlined in Precision Acoustics Systems data files.

Calibration setting name

Help file terminology

Default value

Units

HarpChannelGain

Channel gain (dB)

40

dB

HarpStaticGain

Static gain (G1) (dB)

-112

dB

HarpSourceLevel

Source level (dB)

215

dB

HarpAdcCorrectionX

  • Split-beam TS calibration setting
  • ADC correction X-axis

2048

 

HarpAdcCorrectionY

  • Split-beam TS calibration setting
  • ADC correction Y-axis

1990

 

HarpPdcCorrectionX

  • Split-beam TS calibration setting
  • PDC correction X-axis

400

 

HarpPdcCorrectionY

  • Split-beam TS calibration setting
  • PDC correction Y-axis

960

 

HarpPdiCorrectionX

  • Split-beam TS calibration setting
  • PDI correction X-axis

-139700

 

HarpPdiCorrectionY

  • Split-beam TS calibration setting
  • PDI correction Y-axis

-129700

 

HarpPhaseAngleCorrectionX

  • Split-beam TS calibration setting
  • Phase angle correction X-axis

2049

 

HarpPhaseAngleCorrectionY

  • Split-beam TS calibration setting
  • Phase angle correction Y-axis

1991

 

Simrad SM2000 data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

See also:

Calibration settings for SM2000 data
Common calibration names

Calibration setting name

Help file terminology and ECS file example

Default value

Units

SM2000BeamsToForm

A beamforming calibration setting that specifies the Number of beams to form.

128

 

SM2000Sector

A beamforming calibration setting that specifies the Sector.

Note: Another beamforming setting is Sound speed (a common calibration setting).

120

Degrees

SM2000HeadType

SM2000 Transducer head setitng for the Head type (deg).

Typical Head values:

Head type
(degrees)
Head radius
(meters)
Head spacing
(degrees)
180Degrees
0.1100
1.9620
120Degrees
0.2000
1.1160
90Degrees
0.3874
1.2000
60Degrees
0.4293
0.8496

None

None
60Degrees
90Degrees
120Degrees
180Degreees

SM2000Radius

SM2000 Transducer head setting for the Head Radius (m).

 

0

Metres

SM2000Spacing

SM2000 Transducer head setting for the Head spacing (deg).

 

0

Degrees

Simrad EK80 data format

Calibration setting names, units, default values and valid ranges are displayed under Help menu > Calibration Information. For more information refer to Calibration Information dialog box.

The Simrad EK80 data format uses calibration settings that are drawn from common and other transducer specific settings.

See also:

Calibration settings for Simrad EK80 data
Common calibration names
About transmitted pulse

The following are Simrad EK80 specific settings.

Calibration setting name

Help file terminology

Default value

Units

AbsorptionCoeffcient

Absorption coefficient.

EK80 single frequency (CW) variables use a calculated value for AbsorptionCoefficient based on environmental data read from the file. Environmental data includes water temperature, salinity, acidity, depth, sound speed and frequency.

EK80 FM variables also use environmental data to calculate wideband absorption coefficients.

For both CW and FM variables, an absorption-coefficient override can be applied by specifying an AbsorptionCoefficient value under an appropriate SourceCal in an ECS file.

0.01

dB/m

AbsorptionDepth

Read from EK80 data file and used as depth in the Francois & Garrison (1982) equation.

The Francois & Garrison (1982) equation calculates the absorption coefficient using acidity, temperature and salinity, frequency and depth.

250

 meters

Acidity

Read from EK80 data file. See Common calibration names: Acidity.

The Francois & Garrison (1982) equation calculates the absorption coefficient using acidity, temperature and salinity, frequency and depth.

8.0

pH

EffectivePulseLength

The EffectivePulseLength is calculated using the EK80 matched filter. EffectivePulseLength is used in the calculation of continuous wave Sv and wideband Sv raw variables and may be modified using an ECS file.

For EK80 CW data recorded as non-complex data, the EffectivePulseLength may be calculated using the TransceiverSamplingFrequency.

1

ms

EK60SaCorrection

 

EK60SaCorrection is read from EK80 CW data and is used in the EK80 CW Power to Sv equation.

Sa correction is determined during the calibration process of EK80 CW instruments. The value represents the correction required to the Sv constant to harmonize the TS and Sa (NASC) measurements. Sa corrections are only determined during a calibration, otherwise they are zero.

0

dB

FrequencyEnd

Wideband end frequency.

38

kHz

FrequencyStart

Wideband start frequency.

38

kHz

FrequencyTableWideband

Simrad frequency-dependent Frequency read from an instrument calibrated EK80 data file. FrequencyTableWideband frequency values at array positions are correlated with associated wideband table array data.

See Common calibration names: FrequencyTableWideband and Array position and element number note.

 

Hz

GainTableWideband

Simrad frequency-dependent Gain read from an instrument calibrated EK80 data file.

Array values/interpolated values are used in place of the TransducerGain.

See Common calibration names: GainTableWideband and Array position and element number note.

 

dB

MinorAxisAngleOffsetTableWideband

Simrad frequency-dependent AngleOffsetAlongship read from an instrument calibrated EK80 data file.

See Common calibration names: MinorAxisAngleOffsetTableWideband and Array position and element number note.

 

degrees

MajorAxisAngleOffsetTableWideband

Simrad frequency-dependent AngleOffsetAthwartship read from an instrument calibrated EK80 data file.

See Common calibration names: MajorAxisAngleOffsetTableWideband andArray position and element number note.

 

degrees

MinorAxisBeamWidthTableWideband

Simrad frequency-dependent BeamWidthAlongship read from an instrument calibrated EK80 data file.

Array values/interpolated values are used in place of the MinorAxis3dbBeamAngle.

See Common calibration names: MinorAxisBeamWidthTableWideband andArray position and element number note.

 

degrees

MajorAxisBeamWidthTableWideband

Simrad frequency-dependent BeamWidthAthwartship read from an instrument calibrated EK80 data file.

Array values/interpolated values are used in place of the MajorAxis3dbBeamAngle.

See Common calibration names: MajorAxisBeamWidthTableWideband and Array position and element number note.

 

degrees

NumberOfTransducerSegments

The NumberOfTransducerSegments is read from data files recorded from wideband transceivers. It records the number of transducer segments for the beam. The value is used in the calculation of EK80 received power.

  • 4 is the value for a split beam transducer
  • 3 is the value for a 3 segment transducer
  • 2 is the value for a 2 segment transducer
  • 1 is the value for a single beam transducer

 

 

PulseCompressedEffectivePulseLength

The PulseCompressedEffectivePulseLength is calculated using the EK80 auto-correlated matched filter. PulseCompressedEffectivePulseLength is used in the calculation of pulse compressed wideband Sv raw variables and Single target detection - wideband virtual variables and may be modified using an ECS file.

1

ms

Salinity

Read from the EK80 data file. See Common calibration names: Salinity.

The Francois & Garrison (1982) equation calculates the absorption coefficient using acidity, temperature and salinity, frequency and depth.

32

parts per thousand

SamplingFrequency

Read from the EK80 data file. See Sampling frequency.

44.10

kHz

Temperature

Read from the EK80 data file. See Common calibration names: Temperature.

The Francois & Garrison (1982) equation calculates the absorption coefficient using acidity, temperature and salinity, frequency and depth.

10

degrees Celsius

TransceiverImpedance

This is the Simrad transceiver impedance recorded under the Transceiver element of the data file. This impedance repesents the internal electrical resistance of the WBT unit and is used for the calculation of received power.

Note: Some versions of EK80 files may not record an impedance under the Transceiver element. In such cases a value of 1000 Ohms is used. Please contact Simrad for further information.

1000

Ohms

TransducerImpedanceTableWideband

This is a Simrad transducer impedance. The EK80 Calibration XML file can record a frequency-dependent array under the Impedance element. Echoview also reads such data, when it is present in an EK80 .raw file. However, Echoview does not use the data for EK80 calculations. The calibration setting is hidden but is available to ECS files and EVD files for the sake of completeness.

See also ECS and EVD issue for TransducerImpedanceTableWideband.

1000

Ohms

TransceiverSamplingFrequency

TransceiverSamplingFrequency may be read from the EK80 data file. It may be recorded when data is saved as non-complex data at reduced sampling rate or a reduced file size. TransceiverSamplingFrequency is used to calculate the decimated sampling frequency and the EffectivePulseLength.

Note: An instrument-specific TransceiverSamplingFrequency may be used when RxSampleFrequency is not be present in the data file.

1500

kHz

TransducerGain

Read from the EK80 data file. See Common calibration names: TransducerGain.

26.5

dB

TransmittedPower

Read from the EK80 data file. See Transmitted power.

2000

Watts

TransmittedPulseLength

Simrad EK80 data files may record TransmittedPulseLength values under alternative names.

1

ms

TvgRangeCorrection

TvgRangeCorrection is SimradEK80. Which applies a half pulse length correction to the Sv variable only.

SimradEK80

 

Notes:

See also

Using Echoview in the calibration process
Calibration settings for virtual variables
About time varied gain