Broadband vs narrowband sonar

Shadowmind · 12-15-08, 09:31 PM

I recently tried the RA mod and it models broadband vs. narrowband contacts differently than the LWAMI mod. In LWAMI 3.08 it seems that contacts appear on narrowband long before you can pick them up on broadband. I didn't think about it much at first and I've been playing with the LWAMI mod for several years.

Recently I tried the RA mod and liked the idea that contacts showed up in broadband long before I could accurately detect their tonals. So I started to dig into it. I've never been on a sub, I don't claim to be a sonar expert, but I do a lot of image/signal processing in my job. So I threw together some graphs to prove out my concept.

It was easier if I just threw everything into a PDF and linked to it. Let me know what you think. Am I totally off base. Is there some fundamental concept I am missing?

Thanks.

12-15-08, 09:31 PM	#1
Shadowmind Watch Join Date: Aug 2006 Location: Frozen plans of ND Posts: 17 Downloads: 3 Uploads: 0	Broadband vs narrowband sonar I recently tried the RA mod and it models broadband vs. narrowband contacts differently than the LWAMI mod. In LWAMI 3.08 it seems that contacts appear on narrowband long before you can pick them up on broadband. I didn't think about it much at first and I've been playing with the LWAMI mod for several years. Recently I tried the RA mod and liked the idea that contacts showed up in broadband long before I could accurately detect their tonals. So I started to dig into it. I've never been on a sub, I don't claim to be a sonar expert, but I do a lot of image/signal processing in my job. So I threw together some graphs to prove out my concept. It was easier if I just threw everything into a PDF and linked to it. Let me know what you think. Am I totally off base. Is there some fundamental concept I am missing? Thanks.