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 |
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Power dB raw pings |
Sv raw pings |
TS raw pings |
Angular positions raw pings |
All acoustic variables |
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Calibration page of Variable Properties dialog box |
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Y |
Y |
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Y |
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Y |
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Y |
Y |
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Y |
Y |
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Y |
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Y |
Y |
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Y |
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Y |
Y |
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Y |
Y |
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Y |
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*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 |
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Sv multibeam pings |
magnitude multibeam pings |
All acoustic variables |
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Calibration page of Variable Properties dialog box |
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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 |
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Power dB Power dB pulse compressed |
Sv Sv pulse compressed |
TS TS pulse compressed |
Angular positions Angular positions pulse compressed |
All acoustic variables |
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Calibration page of Variable Properties dialog box |
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Y |
Y |
Y |
Y |
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Wideband Sv only |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Pulse compressed wideband Sv only |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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Y |
Y |
Y |
Y |
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*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