It can be useful to relax the criteria for single target detection to the extreme in order to examine the field of possible targets when tuning the detection.
To detect as many single targets as possible enter the following settings on the Single Target Detection page of the Variable Properties dialog box.
|
Setting |
Value to enter |
|
TS threshold |
Set this to its minimum value (-120 dB re 1m2) |
|
Minimum normalized pulse length |
Set this to its minimum value (0.01) |
|
Maximum normalized pulse length |
Set this to its maximum value (10) |
|
Maximum beam compensation |
Set this to maximum value (35 dB) - split beam and dual beam only |
|
Maximum standard deviation |
Set these to their maximum value (45 degree) - split beam only |
|
Over axis angle threshold |
Set this to minimum value (-99 dB) - dual beam only |
The resulting echogram will display all the possible single target detections available using this operator.
To tune the number and properties of these single targets, do any or all of the following:
Choose appropriate single target detection settings on the Single Target Detection page of the Variable Properties dialog box.
Choose appropriate exclusion lines on the Single Target Detection page of the Variable Properties dialog box.
Choose appropriate Filter settings on the Data page of the Variable Properties dialog box.
About single target detection
Creating single target detection variables from single-beam data
Creating single target detection variables from split-beam data
Creating single target detection variables from dual-beam data
Simrad and Echoview single target detection terminology