Does the side image beam go out at 90deg. angle or at a lesser degree?
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Does the side image beam go out at 90deg. angle or at a lesser degree?
Your DI pics of those fish are great :ThumbsUp I'm still trying to understand what I'm seeing on the SS also.
Doug does a good job explaining side scan in this video. Doesn't matter what brand, the concept is the same.Quote:
Originally Posted by zummy
https://www.youtube.com/watch?v=3xe6pLPdMKc
The center "Main Axis" of each SI sound pulse is emitting at 30° from horizontal....the sound pulse is strongest at this "Main Axis" ...and then the sound radiates out and away from the xducer in an "ever-decreasing" sound strength....Quote:
Originally Posted by minnowtime
Below is the beam form of the right SI sound pulse....mirror this with the left SI sound pulse...(and remember...the SI sound pulse is a thin slice...so the beam form shape below is only a couple inches thick front to back....with each single ping)....
http://i477.photobucket.com/albums/r...pshmz3szda.jpg
Rickie
See if this helps zummy...
I took this screenshot of yours...
http://i477.photobucket.com/albums/r...pshkmvomhq.png
-----------------------
I edited the screenshot...
*The green circles are fish (white echoes)....
*The blue circles are depressions in the lake bottom...
http://i477.photobucket.com/albums/r...ps0xa9vmy6.png
Rickie
Here are some from today
I see a fish just to the left of the boat in this one
http://i49.photobucket.com/albums/f2...ps719b1cd7.png
I don't see much of anything here
http://i49.photobucket.com/albums/f2...psb0c3cc7c.png
These two are obvious
http://i49.photobucket.com/albums/f2...ps85103de1.png
http://i49.photobucket.com/albums/f2...psd23838f4.png
Here's your 2nd shot again...
http://i477.photobucket.com/albums/r...psmczmgyu2.png
Rickie
IMO turn your contrast down some.
Rickie,on 800 khz,what do first null mean?
Keep looking, decrease range a bit, (to 60) , you'll find cool stuff soon.
And go full screen