Thread: Down Imaging vs Side imaging vs neither

heres some good reading............ GPS Accuracy - How Accurate is it?

Originally Posted by kosmo

ok ,i went back and read some of the previous posts.still not quite sure what mikes trying to show here in this picture.i dont think that thats shadows that showing up.im guessing that its noise interference coming from his outboard.heres two pictures that i have with my huminbird 998 at the max. range setting.as you can see theres similar lines, just not as noticeable as on mikes. this is coming from my outboard.this is something that i dont even notice it unless i take a snapshot then view it on my computer,zooming in and out on it. im ok with it

Kosmo, I stand corrected. I've not experienced the "lines" very often myself most likely due to fishing the same cove/creek area that I'm already extremely familliar with, thus I mainly use down scan and 2d. Researching Dr Depths website this morning, I came across the following and found it to be interesting.

DrDepth - R&D

It seems that Lowrances LSS-1 setup tends to overlap/interfere to a point, not so much that it would turn me away from the product as I feel the HDS-8 is one heck of a system. But I'm considering doing my own mapping of the areas I like to fish vs. spending money on maps I'll never use.
I'm leaning towards purchasing the Dr Depth and all the goodies that come with it. It looks to be a nice little hobby with a few rewards for the time and effort.

Again, those shadows....I stand corrected.

Info onblack bars.


The transmit radiation pattern for the Lowrance transducers will be as depicted by the red curve in the chart above, showing one side of the cross track beam pattern. The big ripples in the beam pattern near the 90 degree region (down) are caused by the downscan crystal interference with the side looking crystal. The interference diminishes as you approach 0 degrees (side). This interference causes the striped appearance we see in the Lowrance sidescan images. Via algorithms, Lowrance varies the amount of signal which is processed from each crystal with depth to minimize this interference. In simplified terms this involves the use of varied fan angles for each beam. When you see blocks of blank area, signal conversion is changing rapidly and the processors are temporarily overloaded in an attempt to minimize interference.

Is there a ghost in here ...??

I'm showing Jim's last post as 2-14-2012 ... But yet showed up in the recent thread postings as if someone added a new post...

Rickie

Originally Posted by rnvinc

Is there a ghost in here ...??

I'm showing Jim's last post as 2-14-2012 ... But yet showed up in the recent thread postings as if someone added a new post...

Rickie

Rickie,
This the "real" CarolinaJim, has it been that long since I posted, time flies. Not sure if there is some computer glitch or I have been hacked. I only use this id on 2 forums.

PM me if you have any questions or concerns.

Regards,
Jim

My guess is someone voted and brought it back up top.

Originally Posted by Stymie

My guess is someone voted and brought it back up top.

You are probably right Stymie...

I didn't even think about the OP poll ...
---------

You're right Jim ... Time sure flies...

Rickie

Originally Posted by Stymie

My guess is someone voted and brought it back up top.

That will do it.