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How to clean up the SRC 'Deadzone?

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Rickard:
But have you tested this with a "manual" procedure? This would tell if influence from interference between the SI transducers is a problem. If it's not, then a program that only needs an extra manual setting of inter-transducer distance seems possible. Of course, a program developer must consider the market, is it big enough to make it worth the effort?

I looked at some of my slant range corrected recordings, they show bad zone up to about 1/3 of depth. This means the distance between SI transducers must be at least 2 * 1/3 = 2/3 of depth. (The right channel transducer must be moved 1/3 of depth to left to deliver good recording from the middle of the boat and beyond. The left channel transducer must be moved the same distance in the opposite direction. The sum of these distances will be 2/3 of depth.) With a 10 ft wide vessel this means one can map up to 15 ft depth with good results. At large depth, this method becomes problematic. At 60 ft (20 m) the transducers must be located 40 ft (13 m) apart.

/Rickard

Fishton:
Mmmmmmm, I see the problem here.

Multi 'tiling' type passes seems to be the solution, but double the work as you can only do one left/right, then just one side after that.

Autonomous mapping would make the passes more accurate, but GPS lately is very erratic when it comes to EPE.

Fishton:
But I still see no reason why the Crop tool under 'Create Mosaic' cannot include a 'beginning' of mosaic as well as end of mosaic crop.  ReefMaster has it.

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