Calibration settings for SM2000 and SM20 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 SM2000 and SM20 data files.

We recommend you assess the suitability of the settings available on the Calibration pages for each acoustic 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.

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.

Simrad Mesotech SM2000 FR and Kongsberg Mesotech SM20

Y

Setting is used in calculating data point values.
  Setting is not used in calculating data point values but may be used for other purposes, see Additional uses of Calibration settings
  Setting is not available for this variable.

 

Calibration setting

Details
SM2000 raw data and SM20 data
SM2000 beamformed data
magnitude raw beam pings phase raw beam pings magnitude beamformed raw beam pings phase beamformed raw beam pings Sv beamformed raw beam pings Sv beamformed pings magnitude complex beamformed pings phase complex beamformed pings magnitude beamformed pings

BeamOffsets

       

Y

Y

 

 

 

CalibrationOffset

       

Y

Y

 

 

 

Frequency (kHz)

                 

SM2000BeamsToForm+

   

Y

Y

Y

       

SM2000Sector+ (degrees)

   

Y

Y

Y

       

SoundSpeed+ (m/s)

   

Y

Y

Y

       

SM2000HeadType* (degrees)

Y

Y

Y

Y

Y

       

SM2000Radius* (m)

Y

Y

Y

Y

Y

       

SM2000Spacing* (degrees)

Y

Y

Y

Y

Y

       

Notes:

Typical Head values

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

See also

About transducer geometry
Simrad data files
Raw variables from Simrad SM2000 raw data files
Raw variables from Simrad SM2000 beamformed data files
Raw variables from Kongsberg SM20 data files
Kongsberg SM20 data files
About calibration settings
Entering calibration settings