Notes page

The Notes page of the Variable Properties dialog box displays information about the variable.

General details

Some or all of the following details may be displayed:

Settings	Description
Variable name	The name of the variable Note: You can change the name of virtual variables in this box. Raw variables are named automatically by Echoview.
Short name	Optional short name of the variable. The short name is used as a label for the variable on the: Relative Mean dB graph Variables & Geometry window Window tabs toolbar Operands page of the Variable Properties dialog box
Data type	The data type of the variable
Notes	A text box in which you can enter extra information about this variable

Operator statistics

This section is available for some (not all) virtual variables, as follows:

Kalman GPS smoothing filter

The operator statistics reported include the mean distance and standard deviation in meters between corresponding smoothed and unsmoothed positions for the GPS fixes cruise track from this variable.

After changes have been made to the Smoothing or Data pages, the statistics are displayed as not available ("n/a") until the changes are applied by clicking Apply or OK.

Scan position

The operator statistics reported include:

The number of possible frames identified.
These are the frames that will be detected if an instrument scanning schools detection algorithm is applied to the variable which was specified as Operand 2.
For each frame identified:
- the ping numbers of the first ping and last ping of the frame
- the mean distance each ping (in a frame) is moved by this operator
- the standard deviation of the distance each ping (in a frame) is moved by this operator
The number of possible target-locked ping pairs identified.
These are the target-locked pings that will be detected if the target-locked schools detection algorithm is applied to the variable which was specified as Operand 2.
For all target-locked ping pairs calculate:
- the mean distance each ping (of all target-locked ping pair sets) is moved by this operator;
- the standard deviation of the distance each ping (of all target-locked ping pair sets) is moved by this operator

For each set of target-locked ping pairs identified:

the ping numbers in both Operand 2 and the Target-locked variable specified on the Data page of the Variable Properties dialog box for Operand 2 in the following format:

pings (first) - (last) are locked (x)

where:

	(first)	identifies the first target-locked ping pair in the set in the format (a, b)
	(last)	identifies the last target-locked ping pair in the set in the format (a, b)
	(a,b)	identifies a target-locked ping pair, with a being the number of the ping in Operand 2 and b the number of the ping in the Target-locked variable.
	(x)	is either simultaneous or alternate to indicate the way in which the pings were locked. See Target-locked scanning.
	and all of the ping pairs between (first) and (last) were identified as target locked.

Notes page

General details

Operator statistics

Kalman GPS smoothing filter

Scan position

See also