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<div dir="ltr" data-setdir="false">I don't know...Blue Robotics tends to have pricey stuff. They want $1950 for that pinger but you can get a humminbird helix 9 with mega 360 imaging for about $2000, new. See video link for image comparison. Funny this topic should come up now, I was thinking about suggesting this equipment as a group purchase to keep track of sub location during our events or excursions.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jon</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><a href="https://www.youtube.com/watch?v=pvTMZ3UozsI" rel="nofollow" target="_blank" class="enhancr_card_5572269907">Humminbird Mega 360</a><br></div><div><br></div><div id="ydpf3aac062enhancr_card_5572269907" class="ydpf3aac062yahoo-link-enhancr-card ydpf3aac062ymail-preserve-class ydpf3aac062ymail-preserve-style" style="max-width:400px;font-family:YahooSans, Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif" data-url="https://www.youtube.com/watch?v=pvTMZ3UozsI" data-embed-url="https://www.youtube.com/embed/pvTMZ3UozsI?feature=oembed" data-type="YENHANCER" data-size="MEDIUM" contenteditable="false"><a href="https://www.youtube.com/watch?v=pvTMZ3UozsI" style="text-decoration:none !important;color:#000 !important" class="ydpf3aac062yahoo-enhancr-cardlink" rel="nofollow" target="_blank"><table border="0" class="ydpf3aac062card-wrapper ydpf3aac062yahoo-ignore-table" cellpadding="0" cellspacing="0" style="max-width:400px"><tbody><tr><td width="400"><table border="0" class="ydpf3aac062card ydpf3aac062yahoo-ignore-table" cellpadding="0" cellspacing="0" width="100%" style="max-width:400px;border-width:1px;border-style:solid;border-color:rgb(224, 228, 233);border-radius:2px"><tbody><tr><td class="ydpf3aac062card-primary-image-cell" background="https://s.yimg.com/lo/api/res/1.2/mlz5.lYBRWmXL_RecrGHYg--~A/Zmk9ZmlsbDt3PTQwMDtoPTIwMDthcHBpZD1pZXh0cmFjdA--/https://i.ytimg.com/vi/pvTMZ3UozsI/hqdefault.jpg.cf.jpg" bgcolor="#000000" valign="top" height="175" style="background-color: rgb(0, 0, 0); background-size: cover; position: relative; border-radius: 2px 2px 0px 0px; min-height: 175px;"><!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:396px;height:175px;position:absolute;top:0;left:0;"><v:fill type="frame" color="#000000" src="https://s.yimg.com/lo/api/res/1.2/mlz5.lYBRWmXL_RecrGHYg--~A/Zmk9ZmlsbDt3PTQwMDtoPTIwMDthcHBpZD1pZXh0cmFjdA--/https://i.ytimg.com/vi/pvTMZ3UozsI/hqdefault.jpg.cf.jpg"/></v:rect><![endif]--><table border="0" class="ydpf3aac062card-overlay-container-table ydpf3aac062yahoo-ignore-table" cellpadding="0" cellspacing="0" style="width:100%"><tbody><tr><td class="ydpf3aac062card-overlay-cell" background="https://s.yimg.com/cv/ae/nq/storm/assets/enhancrV21/1/enhancr_gradient-400x175.png" bgcolor="transparent" valign="top" style="background-color: transparent; border-radius: 2px 2px 0px 0px; min-height: 175px;"><!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:396px;height:175px;position:absolute;top:-18px;left:0;"><v:fill type="pattern" color="#000000" src="https://s.yimg.com/cv/ae/nq/storm/assets/enhancrV21/1/enhancr_gradient-400x175.png"/><v:textbox inset="0,0,20px,0"><![endif]--><table border="0" class="ydpf3aac062yahoo-ignore-table" height="175" style="width: 100%; min-height: 175px;"><tbody><tr><td class="ydpf3aac062card-richInfo2" style="text-align:left;padding:15px 0 0 15px;vertical-align:top"></td><td class="ydpf3aac062card-actions" style="text-align:right;padding:15px 15px 0 0;vertical-align:top"><div class="ydpf3aac062card-share-container"></div></td></tr></tbody></table><!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td></tr></tbody></table></td></tr><tr><td><table border="0" align="center" class="ydpf3aac062card-info ydpf3aac062yahoo-ignore-table" cellpadding="0" cellspacing="0" style="background:#fff;position:relative;z-index:2;width:100%;max-width:400px;border-radius:0 0 2px 2px;border-top:1px solid rgb(224, 228, 233)"><tbody><tr><td style="background-color:#ffffff;padding:16px 0 16px 12px;vertical-align:top;border-radius:0 0 0 2px"><img class="ydpf3aac062card-object-1 ydpf3aac062yahoo-ignore-inline-image ydpf3aac062ymail-preserve-class" src="https://s.yimg.com/nq/storm/assets/enhancrV2/23/logos/youtube.png" height="36" style="min-width:36px;margin-top:3px"></td><td style="vertical-align:middle;padding:12px 24px 16px 12px;width:99%;font-family:YahooSans, Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif;border-radius:0 0 2px 0"><h2 class="ydpf3aac062card-title" style="font-size: 14px; line-height: 19px; margin: 0px 0px 6px; font-family: YahooSans, Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif; color: rgb(38, 40, 42); max-width: 314px;">Humminbird Mega 360</h2><p class="ydpf3aac062card-description" style="font-size: 12px; line-height: 16px; margin: 0px; color: rgb(151, 155, 167);"></p></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></a></div><div><br></div><div><br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div><br></div>
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On Sunday, November 8, 2020, 04:43:44 PM EST, irox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydpf5825518yiv3119128827"><div><div style="font-size:13px;color:rgb(0, 0, 0);font-family:arial, sans-serif;"><div style="font-size:13px;color:rgb(0, 0, 0);font-family:arial, sans-serif;">Hi Alan, <div><br></div><div>yeah that's probably one of the best option for open source sonar. I'm hoping that I can install the</div><div>Blue Robotics 360 scanner on Gamma at some point, then feed that into some SLAM (Simultaneous</div><div>Localization And Mapping) type program/module(s) to generate a map and locate the sub in the map.</div><div>It doesn't help with the absolute/global position, but may be useful for in-situ use and after the</div><div>fact analysis.</div><div><br></div><div>Cheers,</div><div> Ian.</div><div><br></div><div><br><blockquote style="padding-left:5px;margin-left:0px;border-left:#0000ff 2px solid;font-weight:normal;font-style:normal;text-decoration:none;font-size:10pt;font-family:arial, sans-serif;color:black;">-----Original Message-----
<br>From: Alan via Personal_Submersibles
<br>Sent: Nov 8, 2020 12:19 PM
<br>To: Personal Submersibles General Discussion
<br>Subject: Re: [PSUBS-MAILIST] Underwater GPS using Underwater Backscatter Localization
<br><br><div></div><div>Thanks Ian,</div><div>there is this Blue Robotics Sonar imaging scanner that has open source software.</div><div><a href="https://bluerobotics.com/store/sensors-sonars-cameras/sonar/ping360-sonar-r1-rp/" rel="nofollow" target="_blank">https://bluerobotics.com/store/sensors-sonars-cameras/sonar/ping360-sonar-r1-rp/</a></div><div>Alan</div><div><br>On 9/11/2020, at 8:36 AM, irox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="nofollow" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;"><br></div><span style="font-size:13px;">MIT has published a paper on underwater positioning using Underwater Backscatter Localization which</span><div><span style="font-size:13px;">might be of interest to some folks on the list.</span></div><div><span style="font-size:13px;"><br></span></div><div><span style="font-size:13px;">Although it seems more focused on positioning of un-powered or under-powered objects (fish, drones, etc</span><div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;">- surface vessel knowing the position of an underwater object), and it's only a proof-of-concept</div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;"> (the paper on covers 1D positioning, we'd really need 3D), it does offer some hope for a relatively cheap</div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;">underwater positioning system in the future.</div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;"><br></div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;">The paper can be found here:</div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;"><a href="http://www.mit.edu/~fadel/papers/UBL-paper.pdf" rel="nofollow" target="_blank">http://www.mit.edu/~fadel/papers/UBL-paper.pdf</a></div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;"><br></div><div style="color:rgb(0, 0, 0);font-family:arial, sans-serif;font-size:13px;">There is a kind of layman's summary here:</div><div><span style="font-size:13px;"><a href="https://hackaday.com/2020/11/08/under-the-sea-gps-uses-sound/" rel="nofollow" target="_blank">https://hackaday.com/2020/11/08/under-the-sea-gps-uses-sound/</a></span></div></div></div><div><span style="font-size:13px;"><br></span></div><div><span style="font-size:13px;">Pity there isn't a a cheap sonar "hackers" kits (although some have do things with PC sound cards).</span></div><div><span style="font-size:13px;">On the radio side of things I can take a USB SDR (Software Defined Radio) and build a radio telescope</span></div><div><span style="font-size:13px;">for well under $100 (actually, I think it was under $50 in the end), would be great to be able to have</span></div><div><span style="font-size:13px;">that flexibility for playing with sonar.</span></div><div><span style="font-size:13px;"><br></span></div><div><span style="font-size:13px;">Cheers,</span></div><div><span style="font-size:13px;"> Ian.</span></div><div><span style="font-size:13px;"><br></span></div></div>
</div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></blockquote></div></div></div></div></div>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br></div>
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