Calibration settings for HTI sample data
This page describes the settings on the Calibration page of the Variable Properties dialog box for variables derived from HTI 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 and which are used for other calculations. The table also details the values used to calculate ranges that Echoview reads straight from the data file.
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:
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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 |
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Variables from HTI .smp data files
|
Setting |
Data point values |
Range |
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|---|---|---|---|---|
|
Sv sample pings |
TS sample pings |
Angular position sample pings |
All acoustic variables |
|
|
Calibration page of Variable Properties dialog box |
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|
Y |
Y |
|||
|
Y |
||||
|
Y |
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|
Y |
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|
Y |
||||
|
Y |
||||
|
Y |
||||
|
Y |
Y |
Y |
||
|
Y |
Y |
|||
|
Y |
||||
|
Y |
||||
|
Y |
||||
|
Y |
||||
|
Y |
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|
Y |
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|
From data file |
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|
Start range |
Y |
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|
Stop range |
Y |
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|
Number of data points |
Y |
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*The setting for Frequency is not used in the calculation of data values but may be used in virtual variable inheritance.
**The setting for Sound speed is only available for *.smp files containing calibration and settings data. SoundSpeed can be read from Version 1.06 .SMP files.
A transducer can be selected in order to apply transducer geometry to the echogram.
See also
About calibration settings
Calibration settings for HTI integrated data
Calibration settings for HTI raw data
Calibration settings for HTI 48 kHz interpolated data
Entering calibration settings
HTI data files
HTI sample data to Sv, TS, and angular position